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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

LEU-Mo Casting Update

The Y-12 National Security Complex (Y-12) participates in the Fuel Fabrication Pillar of the National Nuclear Security Administration’s (NNSA’s) Office of Material Minimization and Management (M3) Office of Conversion Pillar. Y-12’s primary responsibility is to establish the fabrication process for the low-enriched uranium-molybdenum (U-10Mo) feedstock.

11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS↗
DOE OSTI2023

MCNP Neutronic Design Optimization of an Accelerator-Driven Subcritical Assembly for Mo-99 Production

Molybdenum-99 (99Mo) has been in short supply in the recent decades. The most common productionmechanism, irradiation in a reactor fueled by highly enriched uranium (HEU), raisesproliferation concerns. Novel efforts are being pursued to meet the demand for 99Mo withoutHEU irradiation, relying on the processing of low-enriched uranium or natural uranium. Onesuch concept is to use an electron linear accelerator to generate bremsstrahlung that, through aphotonuclear reaction, can help multiply neutrons in a subcritical assembly. The goal of this workwas to neutronically optimize the subcritical assembly for keff and 99Mo production. This optimizationis unique for The design was optimized in terms of reflector type, pitch, and LEU andNU mass. Results of the paper show the effects of fuel mass, pitch, and reflector material on keffand the NU fission fraction. keff was found to be mostly driven by LEU mass, and the NU fissionfraction was dependent on several parameters, primarily pitch and mass.

Conant, Andrew↗
DOE OSTI2020

Materials Data on NiMo8P3 by Materials Project

Mo8NiP3 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are thirty-two inequivalent Mo sites. In the first Mo site, Mo is bonded in a 6-coordinate geometry to nine Mo, three Ni, and two P atoms. There are a spread of Mo–Mo bond distances ranging from 2.62–3.20 Å. There are two shorter (2.82 Å) and one longer (2.84 Å) Mo–Ni bond lengths. There are one shorter (2.49 Å) and one longer (2.50 Å) Mo–P bond lengths. In the second Mo site, Mo is bonded in a 3-coordinate geometry to ten Mo, two equivalent Ni, and two P atoms. There are a spread of Mo–Mo bond distances ranging from 2.61–3.17 Å. There are one shorter (2.80 Å) and one longer (2.83 Å) Mo–Ni bond lengths. There are one shorter (2.48 Å) and one longer (2.52 Å) Mo–P bond lengths. In the third Mo site, Mo is bonded in a 3-coordinate geometry to ten Mo, two equivalent Ni, and two P atoms. There are a spread of Mo–Mo bond distances ranging from 2.60–3.18 Å. There are one shorter (2.79 Å) and one longer (2.83 Å) Mo–Ni bond lengths. There are one shorter (2.48 Å) and one longer (2.51 Å) Mo–P bond lengths. In the fourth Mo site, Mo is bonded in a 6-coordinate geometry to nine Mo, three Ni, and two P atoms. There are a spread of Mo–Mo bond distances ranging from 2.84–3.19 Å. All Mo–Ni bond lengths are 2.84 Å. Both Mo–P bond lengths are 2.48 Å. In the fifth Mo site, Mo is bonded in a 4-coordinate geometry to eleven Mo, one Ni, and two P atoms. There are a spread of Mo–Mo bond distances ranging from 2.84–3.15 Å. The Mo–Ni bond length is 2.89 Å. There are one shorter (2.47 Å) and one longer (2.50 Å) Mo–P bond lengths. In the sixth Mo site, Mo is bonded in a 4-coordinate geometry to eleven Mo, one Ni, and two P atoms. There are a spread of Mo–Mo bond distances ranging from 2.86–3.16 Å. The Mo–Ni bond length is 2.90 Å. Both Mo–P bond lengths are 2.48 Å. In the seventh Mo site, Mo is bonded in a 3-coordinate geometry to five Mo and two P atoms. The Mo–Mo bond length is 2.53 Å. There are one shorter (2.47 Å) and one longer (2.50 Å) Mo–P bond lengths. In the eighth Mo site, Mo is bonded in a 3-coordinate geometry to eleven Mo, one Ni, and two P atoms. There are a spread of Mo–Mo bond distances ranging from 2.57–3.15 Å. The Mo–Ni bond length is 3.02 Å. There are one shorter (2.48 Å) and one longer (2.52 Å) Mo–P bond lengths. In the ninth Mo site, Mo is bonded in a 3-coordinate geometry to five Mo and two P atoms. The Mo–Mo bond length is 2.56 Å. There are one shorter (2.47 Å) and one longer (2.51 Å) Mo–P bond lengths. In the tenth Mo site, Mo is bonded in a 3-coordinate geometry to five Mo and two P atoms. There are one shorter (2.48 Å) and one longer (2.51 Å) Mo–P bond lengths. In the eleventh Mo site, Mo is bonded in a 3-coordinate geometry to eleven Mo, one Ni, and two P atoms. There are a spread of Mo–Mo bond distances ranging from 2.80–3.16 Å. The Mo–Ni bond length is 3.03 Å. There are one shorter (2.51 Å) and one longer (2.54 Å) Mo–P bond lengths. In the twelfth Mo site, Mo is bonded in a 3-coordinate geometry to eleven Mo, one Ni, and two P atoms. There are a spread of Mo–Mo bond distances ranging from 2.80–3.16 Å. The Mo–Ni bond length is 3.02 Å. There are one shorter (2.52 Å) and one longer (2.55 Å) Mo–P bond lengths. In the thirteenth Mo site, Mo is bonded in a 5-coordinate geometry to one Mo, one Ni, and four P atoms. The Mo–Ni bond length is 2.80 Å. There are a spread of Mo–P bond distances ranging from 2.45–2.55 Å. In the fourteenth Mo site, Mo is bonded in a 5-coordinate geometry to two Mo, one Ni, and four P atoms. The Mo–Ni bond length is 2.82 Å. There are a spread of Mo–P bond distances ranging from 2.45–2.54 Å. In the fifteenth Mo site, Mo is bonded in a 5-coordinate geometry to two Mo, one Ni, and four P atoms. The Mo–Ni bond length is 2.83 Å. There are a spread of Mo–P bond distances ranging from 2.44–2.54 Å. In the sixteenth Mo site, Mo is bonded in a 5-coordinate geometry to one Mo, one Ni, and four P atoms. The Mo–Ni bond length is 2.78 Å. There are a spread of Mo–P bond distances ranging from 2.45–2.52 Å. In the seventeenth Mo site, Mo is bonded in a 4-coordinate geometry to two Mo and four P atoms. There are one shorter (2.47 Å) and three longer (2.50 Å) Mo–P bond lengths. In the eighteenth Mo site, Mo is bonded in a 4-coordinate geometry to one Mo and four P atoms. There are a spread of Mo–P bond distances ranging from 2.47–2.50 Å. In the nineteenth Mo site, Mo is bonded in a 5-coordinate geometry to one Mo, one Ni, and four P atoms. The Mo–Ni bond length is 2.75 Å. There are a spread of Mo–P bond distances ranging from 2.45–2.63 Å. In the twentieth Mo site, Mo is bonded in a 5-coordinate geometry to two Mo, one Ni, and four P atoms. The Mo–Ni bond length is 2.74 Å. There are a spread of Mo–P bond distances ranging from 2.45–2.56 Å. In the twenty-first Mo site, Mo is bonded in a 5-coordinate geometry to one Mo, one Ni, and four P atoms. The Mo–Ni bond length is 2.72 Å. There are a spread of Mo–P bond distances ranging from 2.46–2.61 Å. In the twenty-second Mo site, Mo is bonded in a 5-coordinate geometry to one Mo, one Ni, and four P atoms. The Mo–Ni bond length is 2.74 Å. There are a spread of Mo–P bond distances ranging from 2.44–2.53 Å. In the twenty-third Mo site, Mo is bonded in a 4-coordinate geometry to two Mo and four P atoms. There are a spread of Mo–P bond distances ranging from 2.46–2.50 Å. In the twenty-fourth Mo site, Mo is bonded in a 4-coordinate geometry to two Mo and four P atoms. There are a spread of Mo–P bond distances ranging from 2.47–2.50 Å. In the twenty-fifth Mo site, Mo is bonded in a 4-coordinate geometry to five Mo, two equivalent Ni, and two P atoms. There are one shorter (2.75 Å) and one longer (2.76 Å) Mo–Ni bond lengths. There are one shorter (2.47 Å) and one longer (2.48 Å) Mo–P bond lengths. In the twenty-sixth Mo site, Mo is bonded in a 4-coordinate geometry to four Mo, two equivalent Ni, and three P atoms. Both Mo–Ni bond lengths are 2.76 Å. There are a spread of Mo–P bond distances ranging from 2.46–2.87 Å. In the twenty-seventh Mo site, Mo is bonded in a 2-coordinate geometry to three Mo and two P atoms. There are one shorter (2.48 Å) and one longer (2.52 Å) Mo–P bond lengths. In the twenty-eighth Mo site, Mo is bonded in a 2-coordinate geometry to four Mo and two P atoms. There are one shorter (2.46 Å) and one longer (2.48 Å) Mo–P bond lengths. In the twenty-ninth Mo site, Mo is bonded in a 2-coordinate geometry to three Mo and two P atoms. Both Mo–P bond lengths are 2.47 Å. In the thirtieth Mo site, Mo is bonded in a 2-coordinate geometry to three Mo and two P atoms. There are one shorter (2.49 Å) and one longer (2.50 Å) Mo–P bond lengths. In the thirty-first Mo site, Mo is bonded in a 2-coordinate geometry to four Mo and two P atoms. There are one shorter (2.46 Å) and one longer (2.53 Å) Mo–P bond lengths. In the thirty-second Mo site, Mo is bonded in a 2-coordinate geometry to four Mo and two P atoms. There are one shorter (2.47 Å) and one longer (2.53 Å) Mo–P bond lengths. There are four inequivalent Ni sites. In the first Ni site, Ni is bonded in a 2-coordinate geometry to five Mo and two P atoms. There are one shorter (2.35 Å) and one longer (2.36 Å) Ni–P bond lengths. In the second Ni site, Ni is bonded in a 2-coordinate geometry to nine Mo and two P atoms. Both Ni–P bond lengths are 2.32 Å. In the third Ni site, Ni is bonded in a 2-coordinate geometry to eight Mo and two P atoms. There are one shorter (2.31 Å) and one longer (2.33 Å) Ni–P bond lengths. In the fourth Ni site, Ni is bonded in a 2-coordinate geometry to five Mo and two P atoms. There are one shorter (2.31 Å) and one longer (2.38 Å) Ni–P bond lengths. There are twelve inequivalent P sites. In the first P site, P is bonded in a 1-coordinate geometry to seven Mo and one Ni atom. In the second P site, P is bonded in a 1-coordinate geometry to seven Mo and one Ni atom. In the third P site, P is bonded in a 1-coordinate geometry to eight Mo and one Ni atom. In the fourth P site, P is bonded in a 1-coordinate geometry to seven Mo and one Ni atom. In the fifth P site, P is bonded in a 8-coordinate geometry to eight Mo atoms. In the sixth P site, P is bonded in a 8-coordinate geometry to eight Mo atoms. In the seventh P site, P is bonded in a 1-coordinate geometry to seven Mo and one Ni atom. In the eighth P site, P is bonded in a 1-coordinate geometry to seven Mo and one Ni atom. In the ninth P site, P is bonded in a 1-coordinate geometry to seven Mo and one Ni atom. In the tenth P site, P is bonded in a 1-coordinate geometry to seven Mo and one Ni atom. In the eleventh P site, P is bonded in a 8-coordinate geometry to eight Mo atoms. In the twelfth P site, P is bonded in a 8-coordinate geometry to eight Mo atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Mo9O26 by Materials Project

Mo9O26 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are thirty-six inequivalent Mo+5.78+ sites. In the first Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.74–2.37 Å. In the second Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.74–2.39 Å. In the third Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.74–2.40 Å. In the fourth Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.75–2.37 Å. In the fifth Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.75–2.40 Å. In the sixth Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.74–2.39 Å. In the seventh Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.75–2.36 Å. In the eighth Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.75–2.38 Å. In the ninth Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.74–2.40 Å. In the tenth Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.74–2.39 Å. In the eleventh Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.74–2.36 Å. In the twelfth Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.75–2.38 Å. In the thirteenth Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.74–2.41 Å. In the fourteenth Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.75–2.39 Å. In the fifteenth Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.75–2.35 Å. In the sixteenth Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.74–2.38 Å. In the seventeenth Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.74–2.41 Å. In the eighteenth Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.74–2.38 Å. In the nineteenth Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.74–2.41 Å. In the twentieth Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.74–2.40 Å. In the twenty-first Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.74–2.38 Å. In the twenty-second Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.75–2.38 Å. In the twenty-third Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.74–2.41 Å. In the twenty-fourth Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.75–2.37 Å. In the twenty-fifth Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.74–2.38 Å. In the twenty-sixth Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.74–2.38 Å. In the twenty-seventh Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.74–2.39 Å. In the twenty-eighth Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.75–2.35 Å. In the twenty-ninth Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.74–2.40 Å. In the thirtieth Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.74–2.39 Å. In the thirty-first Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.74–2.41 Å. In the thirty-second Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.74–2.41 Å. In the thirty-third Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.75–2.38 Å. In the thirty-fourth Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.75–2.35 Å. In the thirty-fifth Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.74–2.41 Å. In the thirty-sixth Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.75–2.36 Å. There are one hundred and four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to two Mo+5.78+ atoms. In the second O2- site, O2- is bonded in a linear geometry to two Mo+5.78+ atoms. In the third O2- site, O2- is bonded in a 3-coordinate geometry to three Mo+5.78+ atoms. In the fourth O2- site, O2- is bonded in a linear geometry to two Mo+5.78+ atoms. In the fifth O2- site, O2- is bonded in a linear geometry to two Mo+5.78+ atoms. In the sixth O2- site, O2- is bonded in a linear geometry to two Mo+5.78+ atoms. In the seventh O2- site, O2- is bonded in a linear geometry to two Mo+5.78+ atoms. In the eighth O2- site, O2- is bonded in a 3-coordinate geometry to three Mo+5.78+ atoms. In the ninth O2- site, O2- is bonded in a linear geometry to two Mo+5.78+ atoms. In the tenth O2- site, O2- is bonded in a linear geometry to two Mo+5.78+ atoms. In the eleventh O2- site, O2- is bonded in a distorted linear geometry to two Mo+5.78+ atoms. In the twelfth O2- site, O2- is bonded in a bent 120 degrees geometry to two Mo+5.78+ atoms. In the thirteenth O2- site, O2- is bonded in a distorted single-bond geometry to two Mo+5.78+ atoms. In the fourteenth O2- site, O2- is bonded in a distorted single-bond geometry to two Mo+5.78+ atoms. In the fifteenth O2- site, O2- is bonded in a bent 150 degrees geometry to two Mo+5.78+ atoms. In the sixteenth O2- site, O2- is bonded in a distorted single-bond geometry to two Mo+5.78+ atoms. In the seventeenth O2- site, O2- is bonded in a distorted single-bond geometry to two Mo+5.78+ atoms. In the eighteenth O2- site, O2- is bonded in a linear geometry to two Mo+5.78+ atoms. In the nineteenth O2- site, O2- is bonded in a linear geometry to two Mo+5.78+ atoms. In the twentieth O2- site, O2- is bonded in a linear geometry to two Mo+5.78+ atoms. In the twenty-first O2- site, O2- is bonded in a distorted single-bond geometry to two Mo+5.78+ atoms. In the twenty-second O2- site, O2- is bonded in a linear geometry to two Mo+5.78+ atoms. In the twenty-third O2- site, O2- is bonded in a distorted single-bond geometry to two Mo+5.78+ atoms. In the twenty-fourth O2- site, O2- is bonded in a distorted single-bond geometry to two Mo+5.78+ atoms. In the twenty-fifth O2- site, O2- is bonded in a linear geometry to two Mo+5.78+ atoms. In the twenty-sixth O2- site, O2- is bonded in a distorted single-bond geometry to two Mo+5.78+ atoms. In the twenty-seventh O2- site, O2- is bonded in a linear geometry to two Mo+5.78+ atoms. In the twenty-eighth O2- site, O2- is bonded in a linear geometry to two Mo+5.78+ atoms. In the twenty-ninth O2- site, O2- is bonded in a linear geometry to two Mo+5.78+ atoms. In the thirtieth O2- site, O2- is bonded in a linear geometry to two Mo+5.78+ atoms. In the thirty-first O2- site, O2- is bonded in a linear geometry to two Mo+5.78+ atoms. In the thirty-second O2- site, O2- is bonded in a distorted single-bond geometry to two Mo+5.78+ atoms. In the thirty-third O2- site, O2- is bonded in a bent 120 degrees geometry to two Mo+5.78+ atoms. In the thirty-fourth O2- site, O2- is bonded in a linear geometry to two Mo+5.78+ atoms. In the thirty-fifth O2- site, O2- is bonded in a linear geometry to two Mo+5.78+ atoms. In the thirty-sixth O2- site, O2- is bonded in a distorted single-bond geometry to two Mo+5.78+ atoms. In the thirty-seventh O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to three Mo+5.78+ atoms. In the thirty-eighth O2- site, O2- is bonded in a distorted single-bond geometry to two Mo+5.78+ atoms. In the thirty-ninth O2- site, O2- is bonded in a 3-coordinate geometry to three Mo+5.78+ atoms. In the fortieth O2- site, O2- is bonded in a linear geometry to two Mo+5.78+ atoms. In the forty-first O2- site, O2- is bonded in a distorted single-bond geometry to two Mo+5.78+ atoms. In the forty-second O2- site, O2- is bonded in a 3-coordinate geometry to three Mo+5.78+ atoms. In the forty-third O2- site, O2- is bonded in a distorted single-bond geometry to two Mo+5.78+ atoms. In the forty-fourth O2- site, O2- is bonded in a 3-coordinate geometry to three Mo+5.78+ atoms. In the forty-fifth O2- site, O2- is bonded in a linear geometry to two Mo+5.78+ atoms. In the forty-sixth O2- site, O2- is bonded in a distorted single-bond geometry to two Mo+5.78+ atoms. In the forty-seventh O2- site, O2- is bonded in a distorted single-bond geometry to two Mo+5.78+ atoms. In the forty-eighth O2- site, O2- is bonded in a linear geometry to two Mo+5.78+ atoms. In the forty-ninth O2- site, O2- is bonded in a distorted single-bond geometry to two Mo+5.78+ atoms. In the fiftieth O2- site, O2- is bonded in a 3-coordinate geometry to three Mo+5.78+ atoms. In the fifty-first O2- site, O2- is bonded in a linear geometry to two Mo+5.78+ atoms. In the fifty-second O2- site, O2- is bonded in a linear geometry to two Mo+5.78+ atoms. In the fifty-third O2- site, O2- is bonded in a distorted single-bond geometry to two Mo+5.78+ atoms. In the fifty-fourth O2- site, O2- is bonded in a distorted single-bond geometry to two Mo+5.78+ atoms. In the fifty-fifth O2- site, O2- is bonded in a linear geometry to two Mo+5.78+ atoms. In the fifty-sixth O2- site, O2- is bonded in a distorted single-bond geometry to two Mo+5.78+ atoms. In the fifty-seventh O2- site, O2- is bonded in a distorted single-bond geometry to two Mo+5.78+ atoms. In the fifty-eighth O2- site, O2- is bonded in a distorted single-bond geometry to two Mo+5.78+ atoms. In the fifty-ninth O2- site, O2- is bonded in a linear geometry to two Mo+5.78+ atoms. In the sixtieth O2- site, O2- is bonded in a distorted single-bond geometry to two Mo+5.78+ atoms. In the sixty-first O2- site, O2- is bonded in a linear geometry to two Mo+5.78+ atoms. In the sixty-second O2- site, O2- is bonded in a linear geometry to two Mo+5.78+ atoms. In the sixty-third O2- site, O2- is bonded in a bent 120 degrees geometr

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Mo9O26 by Materials Project

Mo9O26 crystallizes in the triclinic P-1 space group. The structure is two-dimensional and consists of one Mo9O26 sheet oriented in the (-1, 0, 1) direction. there are eighteen inequivalent Mo+5.78+ sites. In the first Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.71–2.35 Å. In the second Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.70–2.43 Å. In the third Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.76–2.36 Å. In the fourth Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.70–2.40 Å. In the fifth Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.70–2.45 Å. In the sixth Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.70–2.41 Å. In the seventh Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.70–2.39 Å. In the eighth Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.70–2.40 Å. In the ninth Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.70–2.41 Å. In the tenth Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.71–2.40 Å. In the eleventh Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.69–2.44 Å. In the twelfth Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.70–2.43 Å. In the thirteenth Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.70–2.49 Å. In the fourteenth Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.74–2.34 Å. In the fifteenth Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.70–2.41 Å. In the sixteenth Mo+5.78+ site, Mo+5.78+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.70–2.42 Å. In the seventeenth Mo+5.78+ site, Mo+5.78+ is bonded in a tetrahedral geometry to four O2- atoms. There is one shorter (1.78 Å) and three longer (1.80 Å) Mo–O bond length. In the eighteenth Mo+5.78+ site, Mo+5.78+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Mo–O bond distances ranging from 1.70–2.11 Å. There are fifty-two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted linear geometry to two Mo+5.78+ atoms. In the second O2- site, O2- is bonded in a single-bond geometry to one Mo+5.78+ atom. In the third O2- site, O2- is bonded in a distorted bent 150 degrees geometry to three Mo+5.78+ atoms. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to three Mo+5.78+ atoms. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to three Mo+5.78+ atoms. In the sixth O2- site, O2- is bonded in a single-bond geometry to one Mo+5.78+ atom. In the seventh O2- site, O2- is bonded in a 2-coordinate geometry to three Mo+5.78+ atoms. In the eighth O2- site, O2- is bonded in a single-bond geometry to one Mo+5.78+ atom. In the ninth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two Mo+5.78+ atoms. In the tenth O2- site, O2- is bonded in a single-bond geometry to one Mo+5.78+ atom. In the eleventh O2- site, O2- is bonded in a single-bond geometry to one Mo+5.78+ atom. In the twelfth O2- site, O2- is bonded in a single-bond geometry to one Mo+5.78+ atom. In the thirteenth O2- site, O2- is bonded in a distorted linear geometry to two Mo+5.78+ atoms. In the fourteenth O2- site, O2- is bonded in a single-bond geometry to one Mo+5.78+ atom. In the fifteenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two Mo+5.78+ atoms. In the sixteenth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two Mo+5.78+ atoms. In the seventeenth O2- site, O2- is bonded in a linear geometry to two Mo+5.78+ atoms. In the eighteenth O2- site, O2- is bonded in a single-bond geometry to one Mo+5.78+ atom. In the nineteenth O2- site, O2- is bonded in a 1-coordinate geometry to two Mo+5.78+ atoms. In the twentieth O2- site, O2- is bonded in a distorted linear geometry to two Mo+5.78+ atoms. In the twenty-first O2- site, O2- is bonded in a distorted single-bond geometry to three Mo+5.78+ atoms. In the twenty-second O2- site, O2- is bonded in a single-bond geometry to one Mo+5.78+ atom. In the twenty-third O2- site, O2- is bonded in a 2-coordinate geometry to three Mo+5.78+ atoms. In the twenty-fourth O2- site, O2- is bonded in a 2-coordinate geometry to three Mo+5.78+ atoms. In the twenty-fifth O2- site, O2- is bonded in a 2-coordinate geometry to three Mo+5.78+ atoms. In the twenty-sixth O2- site, O2- is bonded in a single-bond geometry to one Mo+5.78+ atom. In the twenty-seventh O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two Mo+5.78+ atoms. In the twenty-eighth O2- site, O2- is bonded in a linear geometry to two Mo+5.78+ atoms. In the twenty-ninth O2- site, O2- is bonded in a single-bond geometry to one Mo+5.78+ atom. In the thirtieth O2- site, O2- is bonded in a single-bond geometry to one Mo+5.78+ atom. In the thirty-first O2- site, O2- is bonded in a linear geometry to two Mo+5.78+ atoms. In the thirty-second O2- site, O2- is bonded in a distorted linear geometry to two Mo+5.78+ atoms. In the thirty-third O2- site, O2- is bonded in a 3-coordinate geometry to three Mo+5.78+ atoms. In the thirty-fourth O2- site, O2- is bonded in a 2-coordinate geometry to two Mo+5.78+ atoms. In the thirty-fifth O2- site, O2- is bonded in a single-bond geometry to one Mo+5.78+ atom. In the thirty-sixth O2- site, O2- is bonded in a 2-coordinate geometry to three Mo+5.78+ atoms. In the thirty-seventh O2- site, O2- is bonded in a 2-coordinate geometry to three Mo+5.78+ atoms. In the thirty-eighth O2- site, O2- is bonded in a single-bond geometry to one Mo+5.78+ atom. In the thirty-ninth O2- site, O2- is bonded in a distorted linear geometry to two Mo+5.78+ atoms. In the fortieth O2- site, O2- is bonded in a single-bond geometry to one Mo+5.78+ atom. In the forty-first O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two Mo+5.78+ atoms. In the forty-second O2- site, O2- is bonded in a 2-coordinate geometry to three Mo+5.78+ atoms. In the forty-third O2- site, O2- is bonded in a 2-coordinate geometry to three Mo+5.78+ atoms. In the forty-fourth O2- site, O2- is bonded in a linear geometry to two Mo+5.78+ atoms. In the forty-fifth O2- site, O2- is bonded in a 2-coordinate geometry to three Mo+5.78+ atoms. In the forty-sixth O2- site, O2- is bonded in a linear geometry to two Mo+5.78+ atoms. In the forty-seventh O2- site, O2- is bonded in a linear geometry to two Mo+5.78+ atoms. In the forty-eighth O2- site, O2- is bonded in a distorted linear geometry to two Mo+5.78+ atoms. In the forty-ninth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to three Mo+5.78+ atoms. In the fiftieth O2- site, O2- is bonded in a linear geometry to two Mo+5.78+ atoms. In the fifty-first O2- site, O2- is bonded in a linear geometry to two Mo+5.78+ atoms. In the fifty-second O2- site, O2- is bonded in a distorted bent 150 degrees geometry to three Mo+5.78+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Pr4(MoO2)9 by Materials Project

Mo(Pr10Mo22O45)2 crystallizes in the monoclinic Cm space group. The structure is three-dimensional and consists of two molybdenum molecules and one Pr10Mo22O45 framework. In the Pr10Mo22O45 framework, there are fourteen inequivalent Pr3+ sites. In the first Pr3+ site, Pr3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Pr–O bond distances ranging from 2.34–2.79 Å. In the second Pr3+ site, Pr3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Pr–O bond distances ranging from 2.33–2.88 Å. In the third Pr3+ site, Pr3+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Pr–O bond distances ranging from 2.30–2.49 Å. In the fourth Pr3+ site, Pr3+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Pr–O bond distances ranging from 2.27–2.51 Å. In the fifth Pr3+ site, Pr3+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Pr–O bond distances ranging from 2.34–3.01 Å. In the sixth Pr3+ site, Pr3+ is bonded in a 7-coordinate geometry to eight O2- atoms. There are a spread of Pr–O bond distances ranging from 2.40–3.07 Å. In the seventh Pr3+ site, Pr3+ is bonded in a 5-coordinate geometry to eight O2- atoms. There are a spread of Pr–O bond distances ranging from 2.40–3.04 Å. In the eighth Pr3+ site, Pr3+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Pr–O bond distances ranging from 2.33–3.01 Å. In the ninth Pr3+ site, Pr3+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Pr–O bond distances ranging from 2.38–2.73 Å. In the tenth Pr3+ site, Pr3+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Pr–O bond distances ranging from 2.37–2.96 Å. In the eleventh Pr3+ site, Pr3+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Pr–O bond distances ranging from 2.39–2.95 Å. In the twelfth Pr3+ site, Pr3+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Pr–O bond distances ranging from 2.42–3.00 Å. In the thirteenth Pr3+ site, Pr3+ is bonded in a 6-coordinate geometry to eight O2- atoms. There are a spread of Pr–O bond distances ranging from 2.30–2.88 Å. In the fourteenth Pr3+ site, Pr3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Pr–O bond distances ranging from 2.34–2.91 Å. There are twenty-seven inequivalent Mo+2.67+ sites. In the first Mo+2.67+ site, Mo+2.67+ is bonded to five O2- atoms to form corner-sharing MoO5 square pyramids. The corner-sharing octahedra tilt angles range from 45–54°. There are a spread of Mo–O bond distances ranging from 2.13–2.20 Å. In the second Mo+2.67+ site, Mo+2.67+ is bonded to five O2- atoms to form corner-sharing MoO5 square pyramids. The corner-sharing octahedra tilt angles range from 48–51°. There are a spread of Mo–O bond distances ranging from 2.13–2.20 Å. In the third Mo+2.67+ site, Mo+2.67+ is bonded to five O2- atoms to form MoO5 square pyramids that share corners with two equivalent MoO6 octahedra and corners with two equivalent MoO5 square pyramids. The corner-sharing octahedral tilt angles are 51°. There are a spread of Mo–O bond distances ranging from 2.08–2.18 Å. In the fourth Mo+2.67+ site, Mo+2.67+ is bonded to five O2- atoms to form MoO5 square pyramids that share corners with two MoO6 octahedra and corners with two MoO5 square pyramids. The corner-sharing octahedra tilt angles range from 51–55°. There are a spread of Mo–O bond distances ranging from 2.10–2.18 Å. In the fifth Mo+2.67+ site, Mo+2.67+ is bonded in a rectangular see-saw-like geometry to four O2- atoms. There are a spread of Mo–O bond distances ranging from 2.05–2.15 Å. In the sixth Mo+2.67+ site, Mo+2.67+ is bonded in a rectangular see-saw-like geometry to four O2- atoms. There are a spread of Mo–O bond distances ranging from 2.06–2.13 Å. In the seventh Mo+2.67+ site, Mo+2.67+ is bonded in a rectangular see-saw-like geometry to four O2- atoms. There are two shorter (2.15 Å) and two longer (2.16 Å) Mo–O bond lengths. In the eighth Mo+2.67+ site, Mo+2.67+ is bonded in a rectangular see-saw-like geometry to four O2- atoms. There are a spread of Mo–O bond distances ranging from 2.10–2.17 Å. In the ninth Mo+2.67+ site, Mo+2.67+ is bonded to five O2- atoms to form MoO5 square pyramids that share corners with three MoO5 square pyramids, an edgeedge with one MoO6 octahedra, and an edgeedge with one MoO5 square pyramid. There are a spread of Mo–O bond distances ranging from 2.13–2.17 Å. In the tenth Mo+2.67+ site, Mo+2.67+ is bonded to five O2- atoms to form MoO5 square pyramids that share corners with three MoO5 square pyramids, an edgeedge with one MoO6 octahedra, and an edgeedge with one MoO5 square pyramid. There are a spread of Mo–O bond distances ranging from 2.09–2.19 Å. In the eleventh Mo+2.67+ site, Mo+2.67+ is bonded to five O2- atoms to form MoO5 square pyramids that share corners with three MoO5 square pyramids, an edgeedge with one MoO6 octahedra, and an edgeedge with one MoO5 square pyramid. There are a spread of Mo–O bond distances ranging from 2.11–2.21 Å. In the twelfth Mo+2.67+ site, Mo+2.67+ is bonded to five O2- atoms to form MoO5 square pyramids that share corners with two MoO5 square pyramids and an edgeedge with one MoO6 octahedra. There are a spread of Mo–O bond distances ranging from 2.03–2.17 Å. In the thirteenth Mo+2.67+ site, Mo+2.67+ is bonded to five O2- atoms to form MoO5 square pyramids that share corners with two equivalent MoO5 square pyramids and an edgeedge with one MoO6 octahedra. There are a spread of Mo–O bond distances ranging from 2.05–2.16 Å. In the fourteenth Mo+2.67+ site, Mo+2.67+ is bonded in a rectangular see-saw-like geometry to four O2- atoms. There are a spread of Mo–O bond distances ranging from 2.11–2.15 Å. In the fifteenth Mo+2.67+ site, Mo+2.67+ is bonded in a rectangular see-saw-like geometry to four O2- atoms. There are a spread of Mo–O bond distances ranging from 2.10–2.14 Å. In the sixteenth Mo+2.67+ site, Mo+2.67+ is bonded in a rectangular see-saw-like geometry to four O2- atoms. There are a spread of Mo–O bond distances ranging from 2.10–2.15 Å. In the seventeenth Mo+2.67+ site, Mo+2.67+ is bonded to six O2- atoms to form MoO6 octahedra that share a cornercorner with one MoO5 square pyramid and edges with four MoO6 octahedra. There are a spread of Mo–O bond distances ranging from 2.10–2.26 Å. In the eighteenth Mo+2.67+ site, Mo+2.67+ is bonded to six O2- atoms to form MoO6 octahedra that share a cornercorner with one MoO5 square pyramid and edges with four MoO6 octahedra. There are a spread of Mo–O bond distances ranging from 2.06–2.24 Å. In the nineteenth Mo+2.67+ site, Mo+2.67+ is bonded to six O2- atoms to form MoO6 octahedra that share a cornercorner with one MoO5 square pyramid and edges with four MoO6 octahedra. There are a spread of Mo–O bond distances ranging from 2.06–2.24 Å. In the twentieth Mo+2.67+ site, Mo+2.67+ is bonded to six O2- atoms to form MoO6 octahedra that share corners with two MoO5 square pyramids, edges with two MoO6 octahedra, and edges with three MoO5 square pyramids. There are a spread of Mo–O bond distances ranging from 2.05–2.17 Å. In the twenty-first Mo+2.67+ site, Mo+2.67+ is bonded to six O2- atoms to form MoO6 octahedra that share corners with two equivalent MoO5 square pyramids, edges with two equivalent MoO6 octahedra, and edges with three MoO5 square pyramids. There are a spread of Mo–O bond distances ranging from 2.10–2.17 Å. In the twenty-second Mo+2.67+ site, Mo+2.67+ is bonded in a distorted T-shaped geometry to three O2- atoms. There are two shorter (2.09 Å) and one longer (2.15 Å) Mo–O bond lengths. In the twenty-third Mo+2.67+ site, Mo+2.67+ is bonded to six O2- atoms to form MoO6 octahedra that share corners with two MoO5 square pyramids and edges with four MoO6 octahedra. There are a spread of Mo–O bond distances ranging from 2.09–2.15 Å. In the twenty-fourth Mo+2.67+ site, Mo+2.67+ is bonded to six O2- atoms to form MoO6 octahedra that share corners with two equivalent MoO5 square pyramids and edges with four MoO6 octahedra. There are a spread of Mo–O bond distances ranging from 2.12–2.17 Å. In the twenty-fifth Mo+2.67+ site, Mo+2.67+ is bonded in a rectangular see-saw-like geometry to four O2- atoms. There are a spread of Mo–O bond distances ranging from 2.06–2.21 Å. In the twenty-sixth Mo+2.67+ site, Mo+2.67+ is bonded in a rectangular see-saw-like geometry to four O2- atoms. There are a spread of Mo–O bond distances ranging from 2.05–2.21 Å. In the twenty-seventh Mo+2.67+ site, Mo+2.67+ is bonded to six O2- atoms to form edge-sharing MoO6 octahedra. There are a spread of Mo–O bond distances ranging from 2.14–2.18 Å. There are fifty-six inequivalent O2- sites. In the first O2- site, O2- is bonded in a 5-coordinate geometry to three Pr3+ and two Mo+2.67+ atoms. In the second O2- site, O2- is bonded in a 5-coordinate geometry to three Pr3+ and two Mo+2.67+ atoms. In the third O2- site, O2- is bonded in a 3-coordinate geometry to three Pr3+ and two Mo+2.67+ atoms. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to three Mo+2.67+ atoms. In the fifth O2- site, O2- is bonded in a 4-coordinate geometry to one Pr3+ and three Mo+2.67+ atoms. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to three Mo+2.67+ atoms. In the seventh O2- site, O2- is bonded in a 3-coordinate geometry to three Mo+2.67+ atoms. In the eighth O2- site, O2- is bonded to one Pr3+ and three Mo+2.67+ atoms to form distorted corner-sharing OPrMo3 tetrahedra. In the ninth O2- site, O2- is bonded to one Pr3+ and three Mo+2.67+ atoms to form distorted OPrMo3 tetrahedra that share corners with three OPr4 tetrahedra and edges with two equivalent OPr2Mo2 trigonal pyramids. In the tenth O2- site, O2- is bonded in a distorted see-saw-like geometry to two Pr3+ and two Mo+2.67+ atoms. In the eleventh O2- site, O2- is bonded to two Pr3+ and two Mo+2.67+ atoms to form distorted OPr2Mo2 tetrahedra that share corners with two equivalent OPr4 tetrahedra, corners with two OPrMo3 trigonal pyramids, and an edgeedge with one OPr2Mo2 tetrahedra. In the twelfth O2- site, O2- is bonded in a distorted see-saw-like geometry to two Pr3+ and two Mo+2.67+ atoms. In the thirteenth O2- site, O2- is bonded to four Pr3+ atoms to form corner-sharing OPr4 tetrahedra. In the fourteenth O2- site, O2- is bonded to four Pr3+ atoms to form OPr4 tetrahedra that share corners with four OPrMo3 tetrahedra and corners with two equivalent OPr2Mo2 trigonal pyramids. In the fifteenth O2- site, O2- is bonded in a trigonal planar geometry to three Pr3+ atoms. In the sixteenth O2- site, O2- is bonded to four Pr3+ atoms to form corner-sharing OPr4 tetrahedra. In the seventeenth O2- site, O2- is bonded in a distorted see-saw-like geometry to two Pr3+ and two Mo+2.67+ atoms. In the eighteenth O2- site, O2- is bonded in a distorted see-saw-like geometry to two Pr3+ and two Mo+2.67+ atoms. In the nineteenth O2- site, O2- is bonded to two Pr3+ and two Mo+2.67+ atoms to form distorted OPr2Mo2 trigonal pyramids that share corners with four OPr2Mo2 tetrahedra, an edgeedge with one OPrMo3 tetrahedra, and an edgeedge with one OPr2Mo2 trigonal pyramid. In the twentieth O2- site, O2- is bonded in a 3-coordinate geometry to two Pr3+ and two Mo+2.67+ atoms. In the twenty-first O2- site, O2- is bonded in a 3-coordinate geometry to two Pr3+ and two Mo+2.67+ atoms. In the twenty-second O2- site, O2- is bonded in a 3-coordinate geometry to three Pr3+ and two Mo+2.67+ atoms. In the twenty-third O2- site, O2- is bonded in a distorted T-shaped geometry to three Mo+2.67+ atoms. In the twenty-fourth O2- site, O2- is bonded in a 5-coordinate geometry to one Pr3+ and three Mo+2.67+ atoms. In the twenty-fifth O2- site, O2- is bonded in a 5-coordinate geometry to two equivalent Pr3+ and three Mo+2.67+ atoms. In the twenty-sixth O2- si

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Cr8Ni50Mo17 by Materials Project

Mo17Cr8Ni50 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are seventeen inequivalent Mo sites. In the first Mo site, Mo is bonded to one Mo, one Cr, and ten Ni atoms to form distorted MoCrNi10Mo cuboctahedra that share corners with two MoCrNi10Mo cuboctahedra, corners with ten NiCr3Ni7Mo2 cuboctahedra, edges with two CrNi10Mo2 cuboctahedra, edges with ten MoCrNi10Mo cuboctahedra, edges with twelve NiCrNi7Mo4 cuboctahedra, a faceface with one MoNi10Mo2 cuboctahedra, faces with three CrCrNi10Mo cuboctahedra, and faces with fourteen NiCrNi7Mo4 cuboctahedra. The Mo–Mo bond length is 2.64 Å. The Mo–Cr bond length is 2.50 Å. There are a spread of Mo–Ni bond distances ranging from 2.53–2.62 Å. In the second Mo site, Mo is bonded to one Mo, one Cr, and ten Ni atoms to form distorted MoCrNi10Mo cuboctahedra that share corners with two MoCrNi10Mo cuboctahedra, corners with ten NiCrNi7Mo4 cuboctahedra, edges with four CrCrNi10Mo cuboctahedra, edges with eight MoCrNi10Mo cuboctahedra, edges with twelve NiCrNi7Mo4 cuboctahedra, faces with two MoNi10Mo2 cuboctahedra, faces with two CrCrNi10Mo cuboctahedra, and faces with fourteen NiCrNi7Mo4 cuboctahedra. The Mo–Mo bond length is 2.64 Å. The Mo–Cr bond length is 2.50 Å. There are a spread of Mo–Ni bond distances ranging from 2.52–2.63 Å. In the third Mo site, Mo is bonded to two Cr and ten Ni atoms to form MoCr2Ni10 cuboctahedra that share a cornercorner with one MoCr2Ni10 cuboctahedra, a cornercorner with one CrCrNi10Mo cuboctahedra, corners with ten NiCrNi7Mo4 cuboctahedra, edges with two CrCrNi10Mo cuboctahedra, edges with ten MoCrNi10Mo cuboctahedra, edges with twelve NiCr2Ni7Mo3 cuboctahedra, faces with two MoNi10Mo2 cuboctahedra, faces with two CrCrNi10Mo cuboctahedra, and faces with fourteen NiCr3Ni7Mo2 cuboctahedra. There are one shorter (2.58 Å) and one longer (2.65 Å) Mo–Cr bond lengths. There are a spread of Mo–Ni bond distances ranging from 2.54–2.58 Å. In the fourth Mo site, Mo is bonded to two Mo and ten Ni atoms to form distorted MoNi10Mo2 cuboctahedra that share a cornercorner with one MoNi10Mo2 cuboctahedra, a cornercorner with one CrNi10Mo2 cuboctahedra, corners with ten NiCr3Ni7Mo2 cuboctahedra, edges with five MoNi10Mo2 cuboctahedra, edges with seven CrCrNi10Mo cuboctahedra, edges with twelve NiCr2Ni7Mo3 cuboctahedra, faces with four MoCrNi10Mo cuboctahedra, and faces with fourteen NiCr3Ni7Mo2 cuboctahedra. The Mo–Mo bond length is 2.58 Å. There are a spread of Mo–Ni bond distances ranging from 2.55–2.63 Å. In the fifth Mo site, Mo is bonded to two Mo and ten Ni atoms to form MoNi10Mo2 cuboctahedra that share corners with two MoNi10Mo2 cuboctahedra, corners with ten NiCrNi7Mo4 cuboctahedra, edges with four CrCrNi10Mo cuboctahedra, edges with eight MoCrNi10Mo cuboctahedra, edges with twelve NiCr2Ni7Mo3 cuboctahedra, faces with two MoNi10Mo2 cuboctahedra, faces with two CrCrNi10Mo cuboctahedra, and faces with fourteen NiCrNi7Mo4 cuboctahedra. The Mo–Mo bond length is 2.57 Å. There are a spread of Mo–Ni bond distances ranging from 2.55–2.61 Å. In the sixth Mo site, Mo is bonded to two Mo and ten Ni atoms to form MoNi10Mo2 cuboctahedra that share corners with two MoNi10Mo2 cuboctahedra, corners with ten NiCrNi7Mo4 cuboctahedra, edges with five CrCrNi10Mo cuboctahedra, edges with seven MoCrNi10Mo cuboctahedra, edges with twelve NiCr2Ni7Mo3 cuboctahedra, a faceface with one CrCrNi10Mo cuboctahedra, faces with three MoCr2Ni10 cuboctahedra, and faces with fourteen NiCrNi7Mo4 cuboctahedra. The Mo–Mo bond length is 2.57 Å. There are a spread of Mo–Ni bond distances ranging from 2.53–2.62 Å. In the seventh Mo site, Mo is bonded to two Mo and ten Ni atoms to form distorted MoNi10Mo2 cuboctahedra that share corners with two CrCrNi10Mo cuboctahedra, corners with ten NiCr3Ni7Mo2 cuboctahedra, edges with four CrCrNi10Mo cuboctahedra, edges with eight MoNi10Mo2 cuboctahedra, edges with twelve NiCrNi7Mo4 cuboctahedra, faces with four MoCrNi10Mo cuboctahedra, and faces with fourteen NiCrNi7Mo4 cuboctahedra. The Mo–Mo bond length is 2.65 Å. There are a spread of Mo–Ni bond distances ranging from 2.52–2.61 Å. In the eighth Mo site, Mo is bonded to one Mo, one Cr, and ten Ni atoms to form distorted MoCrNi10Mo cuboctahedra that share a cornercorner with one MoCrNi10Mo cuboctahedra, a cornercorner with one CrCrNi10Mo cuboctahedra, corners with ten NiCrNi7Mo4 cuboctahedra, edges with three CrNi10Mo2 cuboctahedra, edges with nine MoCrNi10Mo cuboctahedra, edges with twelve NiCrNi7Mo4 cuboctahedra, faces with two MoNi10Mo2 cuboctahedra, faces with two CrNi10Mo2 cuboctahedra, and faces with fourteen NiCrNi7Mo4 cuboctahedra. The Mo–Cr bond length is 2.57 Å. There are a spread of Mo–Ni bond distances ranging from 2.53–2.65 Å. In the ninth Mo site, Mo is bonded to two Cr and ten Ni atoms to form MoCr2Ni10 cuboctahedra that share corners with two MoCrNi10Mo cuboctahedra, corners with ten NiNi7Mo5 cuboctahedra, edges with two CrCrNi10Mo cuboctahedra, edges with ten MoCrNi10Mo cuboctahedra, edges with twelve NiCrNi7Mo4 cuboctahedra, a faceface with one MoNi10Mo2 cuboctahedra, faces with three CrNi10Mo2 cuboctahedra, and faces with fourteen NiCrNi7Mo4 cuboctahedra. There are one shorter (2.56 Å) and one longer (2.58 Å) Mo–Cr bond lengths. There are a spread of Mo–Ni bond distances ranging from 2.53–2.58 Å. In the tenth Mo site, Mo is bonded to one Mo, one Cr, and ten Ni atoms to form distorted MoCrNi10Mo cuboctahedra that share a cornercorner with one MoCrNi10Mo cuboctahedra, a cornercorner with one CrCrNi10Mo cuboctahedra, corners with ten NiCrNi7Mo4 cuboctahedra, edges with five CrCrNi10Mo cuboctahedra, edges with seven MoCrNi10Mo cuboctahedra, edges with twelve NiCrNi7Mo4 cuboctahedra, a faceface with one CrCrNi10Mo cuboctahedra, faces with three MoCrNi10Mo cuboctahedra, and faces with fourteen NiCrNi7Mo4 cuboctahedra. The Mo–Mo bond length is 2.64 Å. The Mo–Cr bond length is 2.57 Å. There are a spread of Mo–Ni bond distances ranging from 2.54–2.65 Å. In the eleventh Mo site, Mo is bonded to one Mo, one Cr, and ten Ni atoms to form distorted MoCrNi10Mo cuboctahedra that share a cornercorner with one MoCr2Ni10 cuboctahedra, a cornercorner with one CrNi10Mo2 cuboctahedra, corners with ten NiCr2Ni7Mo3 cuboctahedra, edges with five CrCrNi10Mo cuboctahedra, edges with seven MoCrNi10Mo cuboctahedra, edges with twelve NiCrNi7Mo4 cuboctahedra, a faceface with one CrNi10Mo2 cuboctahedra, faces with three MoCrNi10Mo cuboctahedra, and faces with fourteen NiCr2Ni7Mo3 cuboctahedra. The Mo–Mo bond length is 2.71 Å. The Mo–Cr bond length is 2.50 Å. There are a spread of Mo–Ni bond distances ranging from 2.54–2.65 Å. In the twelfth Mo site, Mo is bonded to two Mo and ten Ni atoms to form distorted MoNi10Mo2 cuboctahedra that share corners with two CrCrNi10Mo cuboctahedra, corners with ten NiCrNi7Mo4 cuboctahedra, edges with three CrCrNi10Mo cuboctahedra, edges with nine MoCrNi10Mo cuboctahedra, edges with twelve NiCr2Ni7Mo3 cuboctahedra, faces with four MoCrNi10Mo cuboctahedra, and faces with fourteen NiNi7Mo5 cuboctahedra. The Mo–Mo bond length is 2.66 Å. There are a spread of Mo–Ni bond distances ranging from 2.54–2.60 Å. In the thirteenth Mo site, Mo is bonded to one Mo, one Cr, and ten Ni atoms to form distorted MoCrNi10Mo cuboctahedra that share a cornercorner with one MoCrNi10Mo cuboctahedra, a cornercorner with one CrNi10Mo2 cuboctahedra, corners with ten NiCr3Ni7Mo2 cuboctahedra, edges with four CrCrNi10Mo cuboctahedra, edges with eight MoCrNi10Mo cuboctahedra, edges with twelve NiCrNi7Mo4 cuboctahedra, a faceface with one CrNi10Mo2 cuboctahedra, faces with three MoCrNi10Mo cuboctahedra, and faces with fourteen NiCrNi7Mo4 cuboctahedra. The Mo–Cr bond length is 2.51 Å. There are a spread of Mo–Ni bond distances ranging from 2.54–2.64 Å. In the fourteenth Mo site, Mo is bonded to two Mo and ten Ni atoms to form MoNi10Mo2 cuboctahedra that share corners with two MoCrNi10Mo cuboctahedra, corners with ten NiCrNi7Mo4 cuboctahedra, edges with four CrNi10Mo2 cuboctahedra, edges with eight MoCrNi10Mo cuboctahedra, edges with twelve NiCrNi7Mo4 cuboctahedra, a faceface with one CrNi10Mo2 cuboctahedra, faces with three MoCrNi10Mo cuboctahedra, and faces with fourteen NiCrNi7Mo4 cuboctahedra. The Mo–Mo bond length is 2.60 Å. There are a spread of Mo–Ni bond distances ranging from 2.55–2.61 Å. In the fifteenth Mo site, Mo is bonded to two Mo and ten Ni atoms to form distorted MoNi10Mo2 cuboctahedra that share a cornercorner with one MoNi10Mo2 cuboctahedra, a cornercorner with one CrCrNi10Mo cuboctahedra, corners with ten NiCrNi7Mo4 cuboctahedra, edges with four CrNi10Mo2 cuboctahedra, edges with eight MoCrNi10Mo cuboctahedra, edges with twelve NiCrNi7Mo4 cuboctahedra, faces with four MoCrNi10Mo cuboctahedra, and faces with fourteen NiCrNi7Mo4 cuboctahedra. The Mo–Mo bond length is 2.64 Å. There are a spread of Mo–Ni bond distances ranging from 2.54–2.63 Å. In the sixteenth Mo site, Mo is bonded to one Mo, one Cr, and ten Ni atoms to form distorted MoCrNi10Mo cuboctahedra that share a cornercorner with one MoNi10Mo2 cuboctahedra, a cornercorner with one CrCrNi10Mo cuboctahedra, corners with ten NiCr3Ni7Mo2 cuboctahedra, edges with five CrCrNi10Mo cuboctahedra, edges with seven MoCrNi10Mo cuboctahedra, edges with twelve NiCr2Ni7Mo3 cuboctahedra, a faceface with one CrCrNi10Mo cuboctahedra, faces with three MoCrNi10Mo cuboctahedra, and faces with fourteen NiCrNi7Mo4 cuboctahedra. The Mo–Cr bond length is 2.56 Å. There are a spread of Mo–Ni bond distances ranging from 2.54–2.64 Å. In the seventeenth Mo site, Mo is bonded to one Mo, one Cr, and ten Ni atoms to form distorted MoCrNi10Mo cuboctahedra that share corners with two MoCrNi10Mo cuboctahedra, corners with ten NiCrNi7Mo4 cuboctahedra, edges with three CrNi10Mo2 cuboctahedra, edges with nine MoCrNi10Mo cuboctahedra, edges with twelve NiCr2Ni7Mo3 cuboctahedra, faces with two MoNi10Mo2 cuboctahedra, faces with two CrNi10Mo2 cuboctahedra, and faces with fourteen NiCrNi7Mo4 cuboctahedra. The Mo–Cr bond length is 2.49 Å. There are a spread of Mo–Ni bond distances ranging from 2.53–2.62 Å. There are eight inequivalent Cr sites. In the first Cr site, Cr is bonded to one Mo, one Cr, and ten Ni atoms to form CrCrNi10Mo cuboctahedra that share a cornercorner with one MoCrNi10Mo cuboctahedra, a cornercorner with one CrNi10Mo2 cuboctahedra, corners with ten NiCr2Ni7Mo3 cuboctahedra, edges with four CrCrNi10Mo cuboctahedra, edges with eight MoNi10Mo2 cuboctahedra, edges with twelve NiCrNi7Mo4 cuboctahedra, a faceface with one CrCrNi10Mo cuboctahedra, faces with three MoCrNi10Mo cuboctahedra, and faces with fourteen NiCr3Ni7Mo2 cuboctahedra. The Cr–Cr bond length is 2.42 Å. There are a spread of Cr–Ni bond distances ranging from 2.49–2.59 Å. In the second Cr site, Cr is bonded to two Mo and ten Ni atoms to form CrNi10Mo2 cuboctahedra that share corners with two CrCrNi10Mo cuboctahedra, corners with ten NiCr2Ni7Mo3 cuboctahedra, edges with three CrCrNi10Mo cuboctahedra, edges with nine MoCrNi10Mo cuboctahedra, edges with twelve NiCrNi7Mo4 cuboctahedra, faces with four MoCrNi10Mo cuboctahedra, and faces with fourteen NiCrNi7Mo4 cuboctahedra. There are a spread of Cr–Ni bond distances ranging from 2.49–2.58 Å. In the third Cr site, Cr is bonded to one Mo, one Cr, and ten Ni atoms to form CrCrNi10Mo cuboctahedra that share corners with two MoNi10Mo2 cuboctahedra, corners with ten NiCr2Ni7Mo3 cuboctahedra, edges with five CrCrNi10Mo cuboctahedra, edges with seven MoCrNi10Mo cuboctahedra, edges with twelve NiCrNi7Mo4 cuboctahedra, a faceface with one CrCrNi10Mo cuboctahedra, faces with three MoCrNi10Mo cuboctahedra, and faces with fourteen NiCr3Ni7Mo2 cuboctahedra. The Cr–Cr bond length is 2.43 Å. There are a spread of Cr–Ni bond distances ranging from 2.49–2.61 Å. In the fourth Cr site, Cr is bonded to one Mo, one Cr, and ten Ni atoms to form CrCrNi10Mo cuboctahedra t

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on KMo6S7 by Materials Project

KMo6S7 crystallizes in the monoclinic Pc space group. The structure is three-dimensional. there are four inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 7-coordinate geometry to seven S2- atoms. There are a spread of K–S bond distances ranging from 3.05–3.40 Å. In the second K1+ site, K1+ is bonded in a 5-coordinate geometry to eight S2- atoms. There are a spread of K–S bond distances ranging from 3.13–3.81 Å. In the third K1+ site, K1+ is bonded in a 7-coordinate geometry to seven S2- atoms. There are a spread of K–S bond distances ranging from 3.09–3.78 Å. In the fourth K1+ site, K1+ is bonded in a 7-coordinate geometry to seven S2- atoms. There are a spread of K–S bond distances ranging from 3.19–3.62 Å. There are twenty-four inequivalent Mo+2.17+ sites. In the first Mo+2.17+ site, Mo+2.17+ is bonded in a 4-coordinate geometry to four S2- atoms. There are a spread of Mo–S bond distances ranging from 2.38–2.79 Å. In the second Mo+2.17+ site, Mo+2.17+ is bonded to five S2- atoms to form distorted MoS5 trigonal bipyramids that share a cornercorner with one MoS4 trigonal pyramid and edges with two MoS5 trigonal bipyramids. There are a spread of Mo–S bond distances ranging from 2.25–2.55 Å. In the third Mo+2.17+ site, Mo+2.17+ is bonded in a trigonal non-coplanar geometry to three S2- atoms. There are a spread of Mo–S bond distances ranging from 2.24–2.45 Å. In the fourth Mo+2.17+ site, Mo+2.17+ is bonded in a see-saw-like geometry to four S2- atoms. There are a spread of Mo–S bond distances ranging from 2.39–2.55 Å. In the fifth Mo+2.17+ site, Mo+2.17+ is bonded in a see-saw-like geometry to four S2- atoms. There are a spread of Mo–S bond distances ranging from 2.36–2.61 Å. In the sixth Mo+2.17+ site, Mo+2.17+ is bonded in a distorted see-saw-like geometry to four S2- atoms. There are a spread of Mo–S bond distances ranging from 2.42–2.59 Å. In the seventh Mo+2.17+ site, Mo+2.17+ is bonded to four S2- atoms to form corner-sharing MoS4 trigonal pyramids. There are a spread of Mo–S bond distances ranging from 2.28–2.53 Å. In the eighth Mo+2.17+ site, Mo+2.17+ is bonded to four S2- atoms to form edge-sharing MoS4 trigonal pyramids. There are a spread of Mo–S bond distances ranging from 2.41–2.50 Å. In the ninth Mo+2.17+ site, Mo+2.17+ is bonded in a distorted see-saw-like geometry to four S2- atoms. There are a spread of Mo–S bond distances ranging from 2.43–2.68 Å. In the tenth Mo+2.17+ site, Mo+2.17+ is bonded in a distorted rectangular see-saw-like geometry to four S2- atoms. There are a spread of Mo–S bond distances ranging from 2.40–2.52 Å. In the eleventh Mo+2.17+ site, Mo+2.17+ is bonded to four S2- atoms to form distorted edge-sharing MoS4 tetrahedra. There are a spread of Mo–S bond distances ranging from 2.31–2.42 Å. In the twelfth Mo+2.17+ site, Mo+2.17+ is bonded in a 5-coordinate geometry to four S2- atoms. There are a spread of Mo–S bond distances ranging from 2.37–2.99 Å. In the thirteenth Mo+2.17+ site, Mo+2.17+ is bonded in a 4-coordinate geometry to four S2- atoms. There are a spread of Mo–S bond distances ranging from 2.34–2.62 Å. In the fourteenth Mo+2.17+ site, Mo+2.17+ is bonded in a 5-coordinate geometry to five S2- atoms. There are a spread of Mo–S bond distances ranging from 2.34–2.70 Å. In the fifteenth Mo+2.17+ site, Mo+2.17+ is bonded in a distorted trigonal non-coplanar geometry to three S2- atoms. There are a spread of Mo–S bond distances ranging from 2.39–2.56 Å. In the sixteenth Mo+2.17+ site, Mo+2.17+ is bonded in a 4-coordinate geometry to four S2- atoms. There are a spread of Mo–S bond distances ranging from 2.39–2.93 Å. In the seventeenth Mo+2.17+ site, Mo+2.17+ is bonded in a see-saw-like geometry to four S2- atoms. There are a spread of Mo–S bond distances ranging from 2.38–2.44 Å. In the eighteenth Mo+2.17+ site, Mo+2.17+ is bonded to four S2- atoms to form corner-sharing MoS4 trigonal pyramids. There are a spread of Mo–S bond distances ranging from 2.31–2.44 Å. In the nineteenth Mo+2.17+ site, Mo+2.17+ is bonded in a rectangular see-saw-like geometry to four S2- atoms. There are a spread of Mo–S bond distances ranging from 2.35–2.55 Å. In the twentieth Mo+2.17+ site, Mo+2.17+ is bonded to five S2- atoms to form distorted MoS5 trigonal bipyramids that share a cornercorner with one MoS4 trigonal pyramid and edges with two MoS5 trigonal bipyramids. There are a spread of Mo–S bond distances ranging from 2.38–2.63 Å. In the twenty-first Mo+2.17+ site, Mo+2.17+ is bonded in a rectangular see-saw-like geometry to four S2- atoms. There are a spread of Mo–S bond distances ranging from 2.37–2.45 Å. In the twenty-second Mo+2.17+ site, Mo+2.17+ is bonded in a trigonal non-coplanar geometry to three S2- atoms. There are a spread of Mo–S bond distances ranging from 2.26–2.42 Å. In the twenty-third Mo+2.17+ site, Mo+2.17+ is bonded to five S2- atoms to form distorted MoS5 trigonal bipyramids that share a cornercorner with one MoS4 trigonal pyramid and edges with two MoS5 trigonal bipyramids. There are a spread of Mo–S bond distances ranging from 2.31–2.55 Å. In the twenty-fourth Mo+2.17+ site, Mo+2.17+ is bonded in a 4-coordinate geometry to four S2- atoms. There are a spread of Mo–S bond distances ranging from 2.40–2.66 Å. There are twenty-eight inequivalent S2- sites. In the first S2- site, S2- is bonded in a 4-coordinate geometry to one K1+ and three Mo+2.17+ atoms. In the second S2- site, S2- is bonded in a 2-coordinate geometry to one K1+ and two Mo+2.17+ atoms. In the third S2- site, S2- is bonded in a 4-coordinate geometry to one K1+ and three Mo+2.17+ atoms. In the fourth S2- site, S2- is bonded in a 6-coordinate geometry to two K1+ and four Mo+2.17+ atoms. In the fifth S2- site, S2- is bonded in a 5-coordinate geometry to one K1+ and four Mo+2.17+ atoms. In the sixth S2- site, S2- is bonded in a 4-coordinate geometry to one K1+ and three Mo+2.17+ atoms. In the seventh S2- site, S2- is bonded in a 7-coordinate geometry to one K1+ and six Mo+2.17+ atoms. In the eighth S2- site, S2- is bonded in a 7-coordinate geometry to one K1+ and six Mo+2.17+ atoms. In the ninth S2- site, S2- is bonded in a 3-coordinate geometry to one K1+ and three Mo+2.17+ atoms. In the tenth S2- site, S2- is bonded in a 5-coordinate geometry to one K1+ and four Mo+2.17+ atoms. In the eleventh S2- site, S2- is bonded in a 4-coordinate geometry to one K1+ and four Mo+2.17+ atoms. In the twelfth S2- site, S2- is bonded in a 2-coordinate geometry to one K1+ and two Mo+2.17+ atoms. In the thirteenth S2- site, S2- is bonded in a distorted rectangular see-saw-like geometry to one K1+ and three Mo+2.17+ atoms. In the fourteenth S2- site, S2- is bonded in a 4-coordinate geometry to one K1+ and three Mo+2.17+ atoms. In the fifteenth S2- site, S2- is bonded in a 4-coordinate geometry to one K1+ and three Mo+2.17+ atoms. In the sixteenth S2- site, S2- is bonded in a 3-coordinate geometry to one K1+ and two Mo+2.17+ atoms. In the seventeenth S2- site, S2- is bonded in a 3-coordinate geometry to one K1+ and two Mo+2.17+ atoms. In the eighteenth S2- site, S2- is bonded in a 3-coordinate geometry to three Mo+2.17+ atoms. In the nineteenth S2- site, S2- is bonded in a 5-coordinate geometry to one K1+ and four Mo+2.17+ atoms. In the twentieth S2- site, S2- is bonded in a 3-coordinate geometry to three Mo+2.17+ atoms. In the twenty-first S2- site, S2- is bonded in a 7-coordinate geometry to one K1+ and six Mo+2.17+ atoms. In the twenty-second S2- site, S2- is bonded in a 6-coordinate geometry to one K1+ and five Mo+2.17+ atoms. In the twenty-third S2- site, S2- is bonded in a 3-coordinate geometry to one K1+ and two Mo+2.17+ atoms. In the twenty-fourth S2- site, S2- is bonded in a 6-coordinate geometry to two K1+ and four Mo+2.17+ atoms. In the twenty-fifth S2- site, S2- is bonded in a 6-coordinate geometry to two K1+ and four Mo+2.17+ atoms. In the twenty-sixth S2- site, S2- is bonded in a 3-coordinate geometry to one K1+ and three Mo+2.17+ atoms. In the twenty-seventh S2- site, S2- is bonded in a 3-coordinate geometry to one K1+ and two Mo+2.17+ atoms. In the twenty-eighth S2- site, S2- is bonded in a 5-coordinate geometry to one K1+ and four Mo+2.17+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ni5(Mo3Se4)8 by Materials Project

Ni5(Mo3Se4)8 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are twenty-four inequivalent Mo+2.25+ sites. In the first Mo+2.25+ site, Mo+2.25+ is bonded to five Se2- atoms to form MoSe5 square pyramids that share corners with four MoSe5 square pyramids, corners with three NiSe4 tetrahedra, and edges with five MoSe5 square pyramids. There are a spread of Mo–Se bond distances ranging from 2.56–2.71 Å. In the second Mo+2.25+ site, Mo+2.25+ is bonded to five Se2- atoms to form MoSe5 square pyramids that share corners with four MoSe5 square pyramids, corners with two equivalent NiSe4 tetrahedra, and edges with five MoSe5 square pyramids. There are a spread of Mo–Se bond distances ranging from 2.56–2.70 Å. In the third Mo+2.25+ site, Mo+2.25+ is bonded to five Se2- atoms to form MoSe5 square pyramids that share corners with four MoSe5 square pyramids, edges with five MoSe5 square pyramids, and edges with two NiSe4 tetrahedra. There are a spread of Mo–Se bond distances ranging from 2.54–2.73 Å. In the fourth Mo+2.25+ site, Mo+2.25+ is bonded to five Se2- atoms to form MoSe5 square pyramids that share corners with four MoSe5 square pyramids, corners with two NiSe4 tetrahedra, and edges with five MoSe5 square pyramids. There are a spread of Mo–Se bond distances ranging from 2.58–2.75 Å. In the fifth Mo+2.25+ site, Mo+2.25+ is bonded to five Se2- atoms to form MoSe5 square pyramids that share corners with four MoSe5 square pyramids, corners with two equivalent NiSe4 tetrahedra, and edges with five MoSe5 square pyramids. There are a spread of Mo–Se bond distances ranging from 2.54–2.72 Å. In the sixth Mo+2.25+ site, Mo+2.25+ is bonded to five Se2- atoms to form MoSe5 square pyramids that share corners with four MoSe5 square pyramids, corners with four NiSe4 tetrahedra, and edges with five MoSe5 square pyramids. There are a spread of Mo–Se bond distances ranging from 2.54–2.71 Å. In the seventh Mo+2.25+ site, Mo+2.25+ is bonded to five Se2- atoms to form MoSe5 square pyramids that share corners with four MoSe5 square pyramids, corners with two NiSe4 tetrahedra, edges with five MoSe5 square pyramids, and an edgeedge with one NiSe4 tetrahedra. There are a spread of Mo–Se bond distances ranging from 2.55–2.68 Å. In the eighth Mo+2.25+ site, Mo+2.25+ is bonded to five Se2- atoms to form MoSe5 square pyramids that share corners with four MoSe5 square pyramids, a cornercorner with one NiSe4 tetrahedra, edges with five MoSe5 square pyramids, and a faceface with one NiSe4 tetrahedra. There are a spread of Mo–Se bond distances ranging from 2.55–2.74 Å. In the ninth Mo+2.25+ site, Mo+2.25+ is bonded to five Se2- atoms to form MoSe5 square pyramids that share corners with four MoSe5 square pyramids, a cornercorner with one NiSe4 tetrahedra, edges with five MoSe5 square pyramids, and an edgeedge with one NiSe4 tetrahedra. There are a spread of Mo–Se bond distances ranging from 2.55–2.69 Å. In the tenth Mo+2.25+ site, Mo+2.25+ is bonded to five Se2- atoms to form MoSe5 square pyramids that share corners with four MoSe5 square pyramids, a cornercorner with one NiSe4 tetrahedra, edges with five MoSe5 square pyramids, and an edgeedge with one NiSe4 tetrahedra. There are a spread of Mo–Se bond distances ranging from 2.54–2.71 Å. In the eleventh Mo+2.25+ site, Mo+2.25+ is bonded to five Se2- atoms to form MoSe5 square pyramids that share corners with four MoSe5 square pyramids, corners with three NiSe4 tetrahedra, and edges with five MoSe5 square pyramids. There are a spread of Mo–Se bond distances ranging from 2.55–2.76 Å. In the twelfth Mo+2.25+ site, Mo+2.25+ is bonded to five Se2- atoms to form MoSe5 square pyramids that share corners with four MoSe5 square pyramids, corners with two NiSe4 tetrahedra, and edges with five MoSe5 square pyramids. There are a spread of Mo–Se bond distances ranging from 2.56–2.72 Å. In the thirteenth Mo+2.25+ site, Mo+2.25+ is bonded to five Se2- atoms to form MoSe5 square pyramids that share corners with four MoSe5 square pyramids, a cornercorner with one NiSe4 tetrahedra, edges with five MoSe5 square pyramids, and an edgeedge with one NiSe4 tetrahedra. There are a spread of Mo–Se bond distances ranging from 2.54–2.71 Å. In the fourteenth Mo+2.25+ site, Mo+2.25+ is bonded to five Se2- atoms to form MoSe5 square pyramids that share corners with four MoSe5 square pyramids, a cornercorner with one NiSe4 tetrahedra, edges with five MoSe5 square pyramids, and an edgeedge with one NiSe4 tetrahedra. There are a spread of Mo–Se bond distances ranging from 2.54–2.69 Å. In the fifteenth Mo+2.25+ site, Mo+2.25+ is bonded to five Se2- atoms to form MoSe5 square pyramids that share corners with four MoSe5 square pyramids, corners with two equivalent NiSe4 tetrahedra, edges with five MoSe5 square pyramids, and an edgeedge with one NiSe4 tetrahedra. There are a spread of Mo–Se bond distances ranging from 2.59–2.73 Å. In the sixteenth Mo+2.25+ site, Mo+2.25+ is bonded to five Se2- atoms to form MoSe5 square pyramids that share corners with four MoSe5 square pyramids, corners with three NiSe4 tetrahedra, and edges with five MoSe5 square pyramids. There are a spread of Mo–Se bond distances ranging from 2.55–2.76 Å. In the seventeenth Mo+2.25+ site, Mo+2.25+ is bonded to five Se2- atoms to form MoSe5 square pyramids that share corners with four MoSe5 square pyramids, corners with two equivalent NiSe4 tetrahedra, and edges with five MoSe5 square pyramids. There are a spread of Mo–Se bond distances ranging from 2.56–2.74 Å. In the eighteenth Mo+2.25+ site, Mo+2.25+ is bonded to five Se2- atoms to form MoSe5 square pyramids that share corners with four MoSe5 square pyramids, edges with five MoSe5 square pyramids, and a faceface with one NiSe4 tetrahedra. There are a spread of Mo–Se bond distances ranging from 2.56–2.76 Å. In the nineteenth Mo+2.25+ site, Mo+2.25+ is bonded to five Se2- atoms to form MoSe5 square pyramids that share corners with four MoSe5 square pyramids, a cornercorner with one NiSe4 tetrahedra, edges with five MoSe5 square pyramids, and a faceface with one NiSe4 tetrahedra. There are a spread of Mo–Se bond distances ranging from 2.55–2.76 Å. In the twentieth Mo+2.25+ site, Mo+2.25+ is bonded to five Se2- atoms to form MoSe5 square pyramids that share corners with four MoSe5 square pyramids, corners with two equivalent NiSe4 tetrahedra, and edges with five MoSe5 square pyramids. There are a spread of Mo–Se bond distances ranging from 2.55–2.67 Å. In the twenty-first Mo+2.25+ site, Mo+2.25+ is bonded to five Se2- atoms to form MoSe5 square pyramids that share corners with four MoSe5 square pyramids, a cornercorner with one NiSe4 tetrahedra, edges with five MoSe5 square pyramids, and a faceface with one NiSe4 tetrahedra. There are a spread of Mo–Se bond distances ranging from 2.56–2.75 Å. In the twenty-second Mo+2.25+ site, Mo+2.25+ is bonded to five Se2- atoms to form MoSe5 square pyramids that share corners with four MoSe5 square pyramids, corners with two NiSe4 tetrahedra, edges with five MoSe5 square pyramids, and a faceface with one NiSe4 tetrahedra. There are a spread of Mo–Se bond distances ranging from 2.57–2.76 Å. In the twenty-third Mo+2.25+ site, Mo+2.25+ is bonded to five Se2- atoms to form MoSe5 square pyramids that share corners with four MoSe5 square pyramids, edges with five MoSe5 square pyramids, and edges with two NiSe4 tetrahedra. There are a spread of Mo–Se bond distances ranging from 2.54–2.71 Å. In the twenty-fourth Mo+2.25+ site, Mo+2.25+ is bonded to five Se2- atoms to form MoSe5 square pyramids that share corners with four MoSe5 square pyramids, corners with two equivalent NiSe4 tetrahedra, and edges with five MoSe5 square pyramids. There are a spread of Mo–Se bond distances ranging from 2.55–2.73 Å. There are five inequivalent Ni2+ sites. In the first Ni2+ site, Ni2+ is bonded to four Se2- atoms to form NiSe4 tetrahedra that share corners with eight MoSe5 square pyramids, edges with two MoSe5 square pyramids, and a faceface with one MoSe5 square pyramid. There are a spread of Ni–Se bond distances ranging from 2.34–2.47 Å. In the second Ni2+ site, Ni2+ is bonded to four Se2- atoms to form NiSe4 tetrahedra that share corners with eight MoSe5 square pyramids, edges with two MoSe5 square pyramids, and a faceface with one MoSe5 square pyramid. There are a spread of Ni–Se bond distances ranging from 2.33–2.49 Å. In the third Ni2+ site, Ni2+ is bonded to four Se2- atoms to form NiSe4 tetrahedra that share corners with eight MoSe5 square pyramids, edges with two MoSe5 square pyramids, and a faceface with one MoSe5 square pyramid. There are a spread of Ni–Se bond distances ranging from 2.34–2.46 Å. In the fourth Ni2+ site, Ni2+ is bonded to four Se2- atoms to form NiSe4 tetrahedra that share corners with eight MoSe5 square pyramids, edges with two MoSe5 square pyramids, and a faceface with one MoSe5 square pyramid. There are a spread of Ni–Se bond distances ranging from 2.33–2.48 Å. In the fifth Ni2+ site, Ni2+ is bonded to four Se2- atoms to form NiSe4 tetrahedra that share corners with eight MoSe5 square pyramids, edges with two MoSe5 square pyramids, and a faceface with one MoSe5 square pyramid. There are a spread of Ni–Se bond distances ranging from 2.33–2.49 Å. There are thirty-two inequivalent Se2- sites. In the first Se2- site, Se2- is bonded in a 5-coordinate geometry to four Mo+2.25+ and one Ni2+ atom. In the second Se2- site, Se2- is bonded in a 5-coordinate geometry to four Mo+2.25+ and one Ni2+ atom. In the third Se2- site, Se2- is bonded in a 5-coordinate geometry to four Mo+2.25+ and one Ni2+ atom. In the fourth Se2- site, Se2- is bonded in a 4-coordinate geometry to four Mo+2.25+ atoms. In the fifth Se2- site, Se2- is bonded in a 6-coordinate geometry to three Mo+2.25+ atoms. In the sixth Se2- site, Se2- is bonded in a 4-coordinate geometry to four Mo+2.25+ atoms. In the seventh Se2- site, Se2- is bonded in a 6-coordinate geometry to three Mo+2.25+ atoms. In the eighth Se2- site, Se2- is bonded in a 4-coordinate geometry to four Mo+2.25+ atoms. In the ninth Se2- site, Se2- is bonded in a 1-coordinate geometry to three Mo+2.25+ and one Ni2+ atom. In the tenth Se2- site, Se2- is bonded in a 5-coordinate geometry to four Mo+2.25+ and one Ni2+ atom. In the eleventh Se2- site, Se2- is bonded in a 1-coordinate geometry to three Mo+2.25+ and one Ni2+ atom. In the twelfth Se2- site, Se2- is bonded in a 5-coordinate geometry to four Mo+2.25+ and one Ni2+ atom. In the thirteenth Se2- site, Se2- is bonded in a 5-coordinate geometry to four Mo+2.25+ and one Ni2+ atom. In the fourteenth Se2- site, Se2- is bonded in a 4-coordinate geometry to four Mo+2.25+ atoms. In the fifteenth Se2- site, Se2- is bonded in a distorted rectangular see-saw-like geometry to four Mo+2.25+ atoms. In the sixteenth Se2- site, Se2- is bonded in a 4-coordinate geometry to four Mo+2.25+ atoms. In the seventeenth Se2- site, Se2- is bonded in a 1-coordinate geometry to four Mo+2.25+ and one Ni2+ atom. In the eighteenth Se2- site, Se2- is bonded in a 1-coordinate geometry to four Mo+2.25+ and one Ni2+ atom. In the nineteenth Se2- site, Se2- is bonded in a distorted rectangular see-saw-like geometry to four Mo+2.25+ atoms. In the twentieth Se2- site, Se2- is bonded in a 5-coordinate geometry to four Mo+2.25+ and one Ni2+ atom. In the twenty-first Se2- site, Se2- is bonded in a 4-coordinate geometry to four Mo+2.25+ atoms. In the twenty-second Se2- site, Se2- is bonded in a 1-coordinate geometry to three Mo+2.25+ and one Ni2+ atom. In the twenty-third Se2- site, Se2- is bonded in a 5-coordinate geometry to four Mo+2.25+ and one Ni2+ atom. In the twenty-fourth Se2- site, Se2- is bonded in a 1-coordinate geometry to three Mo+2.25+ and one Ni2+ atom. In the twenty-fifth Se2- site, Se2- is bonded in a 5-coordinate geometry to four Mo+2.25+ and one Ni2+ atom. In the twenty-sixth Se2- site, Se2- is bonded in a 1-coordinate geom

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