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DOE OSTI2020

Materials Data on K7H12Pt4C16(N8O3)2 by Materials Project

K7Pt4C16H12(N8O3)2 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are seven inequivalent K1+ sites. In the first K1+ site, K1+ is bonded to three N3- and two O2- atoms to form distorted edge-sharing KN3O2 square pyramids. There are a spread of K–N bond distances ranging from 2.85–3.03 Å. There are one shorter (2.85 Å) and one longer (2.94 Å) K–O bond lengths. In the second K1+ site, K1+ is bonded in a 6-coordinate geometry to five N3- and one O2- atom. There are a spread of K–N bond distances ranging from 2.81–3.25 Å. The K–O bond length is 2.79 Å. In the third K1+ site, K1+ is bonded in a distorted rectangular see-saw-like geometry to two N3- and two O2- atoms. There are one shorter (2.92 Å) and one longer (3.25 Å) K–N bond lengths. There are one shorter (2.70 Å) and one longer (2.86 Å) K–O bond lengths. In the fourth K1+ site, K1+ is bonded in a distorted rectangular see-saw-like geometry to two N3- and two O2- atoms. There are one shorter (2.92 Å) and one longer (3.26 Å) K–N bond lengths. There are one shorter (2.71 Å) and one longer (2.87 Å) K–O bond lengths. In the fifth K1+ site, K1+ is bonded in a distorted rectangular see-saw-like geometry to two N3- and two O2- atoms. There are one shorter (2.90 Å) and one longer (2.92 Å) K–N bond lengths. There are one shorter (2.82 Å) and one longer (2.84 Å) K–O bond lengths. In the sixth K1+ site, K1+ is bonded in a 6-coordinate geometry to five N3- and one O2- atom. There are a spread of K–N bond distances ranging from 2.81–3.23 Å. The K–O bond length is 2.76 Å. In the seventh K1+ site, K1+ is bonded to three N3- and two O2- atoms to form distorted edge-sharing KN3O2 square pyramids. There are a spread of K–N bond distances ranging from 2.84–3.04 Å. There are one shorter (2.84 Å) and one longer (2.93 Å) K–O bond lengths. There are four inequivalent Pt2- sites. In the first Pt2- site, Pt2- is bonded in a square co-planar geometry to two C+3.06+ and two N3- atoms. Both Pt–C bond lengths are 2.01 Å. Both Pt–N bond lengths are 1.99 Å. In the second Pt2- site, Pt2- is bonded in a rectangular see-saw-like geometry to two C+3.06+ and two N3- atoms. There are one shorter (2.00 Å) and one longer (2.01 Å) Pt–C bond lengths. Both Pt–N bond lengths are 1.98 Å. In the third Pt2- site, Pt2- is bonded in a square co-planar geometry to two C+3.06+ and two equivalent N3- atoms. Both Pt–C bond lengths are 2.01 Å. Both Pt–N bond lengths are 1.99 Å. In the fourth Pt2- site, Pt2- is bonded in a rectangular see-saw-like geometry to two C+3.06+ and two N3- atoms. There are one shorter (2.00 Å) and one longer (2.01 Å) Pt–C bond lengths. There is one shorter (1.98 Å) and one longer (1.99 Å) Pt–N bond length. There are fourteen inequivalent C+3.06+ sites. In the first C+3.06+ site, C+3.06+ is bonded in a linear geometry to one Pt2- and one N3- atom. The C–N bond length is 1.17 Å. In the second C+3.06+ site, C+3.06+ is bonded in a single-bond geometry to one N3- atom. The C–N bond length is 1.18 Å. In the third C+3.06+ site, C+3.06+ is bonded in a linear geometry to one Pt2- and one N3- atom. The C–N bond length is 1.17 Å. In the fourth C+3.06+ site, C+3.06+ is bonded in a single-bond geometry to one N3- atom. The C–N bond length is 1.18 Å. In the fifth C+3.06+ site, C+3.06+ is bonded in a linear geometry to one Pt2- and one N3- atom. The C–N bond length is 1.17 Å. In the sixth C+3.06+ site, C+3.06+ is bonded in a distorted linear geometry to one Pt2- and one N3- atom. The C–N bond length is 1.17 Å. In the seventh C+3.06+ site, C+3.06+ is bonded in a single-bond geometry to one N3- atom. The C–N bond length is 1.18 Å. In the eighth C+3.06+ site, C+3.06+ is bonded in a single-bond geometry to one N3- atom. The C–N bond length is 1.18 Å. In the ninth C+3.06+ site, C+3.06+ is bonded in a distorted linear geometry to one Pt2- and one N3- atom. The C–N bond length is 1.17 Å. In the tenth C+3.06+ site, C+3.06+ is bonded in a linear geometry to one Pt2- and one N3- atom. The C–N bond length is 1.17 Å. In the eleventh C+3.06+ site, C+3.06+ is bonded in a single-bond geometry to one N3- atom. The C–N bond length is 1.18 Å. In the twelfth C+3.06+ site, C+3.06+ is bonded in a linear geometry to one Pt2- and one N3- atom. The C–N bond length is 1.17 Å. In the thirteenth C+3.06+ site, C+3.06+ is bonded in a single-bond geometry to one N3- atom. The C–N bond length is 1.18 Å. In the fourteenth C+3.06+ site, C+3.06+ is bonded in a linear geometry to one Pt2- and one N3- atom. The C–N bond length is 1.17 Å. There are fifteen inequivalent N3- sites. In the first N3- site, N3- is bonded in a 1-coordinate geometry to three K1+ and one C+3.06+ atom. In the second N3- site, N3- is bonded in a linear geometry to one Pt2- and one C+3.06+ atom. In the third N3- site, N3- is bonded in a distorted single-bond geometry to three K1+ and one C+3.06+ atom. In the fourth N3- site, N3- is bonded in a linear geometry to one Pt2- and one C+3.06+ atom. In the fifth N3- site, N3- is bonded in a 1-coordinate geometry to three K1+ and one C+3.06+ atom. In the sixth N3- site, N3- is bonded in a single-bond geometry to two K1+ and one C+3.06+ atom. In the seventh N3- site, N3- is bonded in a linear geometry to one Pt2- and one C+3.06+ atom. The N–C bond length is 1.18 Å. In the eighth N3- site, N3- is bonded in a linear geometry to one Pt2- and one C+3.06+ atom. In the ninth N3- site, N3- is bonded in a distorted linear geometry to one Pt2- and one C+3.06+ atom. In the tenth N3- site, N3- is bonded in a distorted single-bond geometry to two K1+ and one C+3.06+ atom. In the eleventh N3- site, N3- is bonded in a 1-coordinate geometry to three K1+ and one C+3.06+ atom. In the twelfth N3- site, N3- is bonded in a linear geometry to one Pt2- and one C+3.06+ atom. In the thirteenth N3- site, N3- is bonded in a distorted single-bond geometry to three K1+ and one C+3.06+ atom. In the fourteenth N3- site, N3- is bonded in a linear geometry to one Pt2- and one C+3.06+ atom. In the fifteenth N3- site, N3- is bonded in a 1-coordinate geometry to three K1+ and one C+3.06+ atom. There are twelve inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the third H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the fifth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the sixth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the seventh H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the eighth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the ninth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the tenth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the eleventh H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the twelfth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted water-like geometry to two K1+ and two H1+ atoms. In the second O2- site, O2- is bonded in a water-like geometry to two K1+ and two H1+ atoms. In the third O2- site, O2- is bonded in a distorted water-like geometry to two K1+ and two H1+ atoms. In the fourth O2- site, O2- is bonded in a distorted water-like geometry to two K1+ and two H1+ atoms. In the fifth O2- site, O2- is bonded in a water-like geometry to two K1+ and two H1+ atoms. In the sixth O2- site, O2- is bonded in a distorted water-like geometry to two K1+ and two H1+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K2Cd3S4 by Materials Project

K2Cd3S4 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded to six S2- atoms to form KS6 octahedra that share corners with twelve CdS4 tetrahedra, edges with six KS6 octahedra, and edges with three CdS4 tetrahedra. There are a spread of K–S bond distances ranging from 3.37–3.41 Å. In the second K1+ site, K1+ is bonded to six S2- atoms to form distorted KS6 octahedra that share corners with ten CdS4 tetrahedra, edges with six KS6 octahedra, and edges with four CdS4 tetrahedra. There are a spread of K–S bond distances ranging from 3.18–3.45 Å. There are two inequivalent Cd2+ sites. In the first Cd2+ site, Cd2+ is bonded to four S2- atoms to form CdS4 tetrahedra that share corners with eight KS6 octahedra, corners with four CdS4 tetrahedra, edges with two KS6 octahedra, and edges with two CdS4 tetrahedra. The corner-sharing octahedra tilt angles range from 8–93°. There are a spread of Cd–S bond distances ranging from 2.53–2.70 Å. In the second Cd2+ site, Cd2+ is bonded to four S2- atoms to form CdS4 tetrahedra that share corners with six KS6 octahedra, corners with four equivalent CdS4 tetrahedra, edges with three KS6 octahedra, and edges with two equivalent CdS4 tetrahedra. The corner-sharing octahedra tilt angles range from 11–95°. There are a spread of Cd–S bond distances ranging from 2.52–2.68 Å. There are three inequivalent S2- sites. In the first S2- site, S2- is bonded to three K1+ and three Cd2+ atoms to form a mixture of distorted corner and edge-sharing SK3Cd3 octahedra. The corner-sharing octahedra tilt angles range from 0–68°. In the second S2- site, S2- is bonded to three K1+ and three Cd2+ atoms to form a mixture of distorted corner and edge-sharing SK3Cd3 octahedra. The corner-sharing octahedra tilt angles range from 0–68°. In the third S2- site, S2- is bonded in a 6-coordinate geometry to three K1+ and three Cd2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K by Materials Project

K is Hg_xSn-like structured and crystallizes in the tetragonal I4_1/amd space group. The structure is three-dimensional. K is bonded to eight equivalent K atoms to form a mixture of corner and edge-sharing KK8 hexagonal bipyramids. There are four shorter (4.43 Å) and four longer (4.53 Å) K–K bond lengths.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K5U4VS4O33 by Materials Project

K5U4VS4O33 crystallizes in the tetragonal P4/n space group. The structure is three-dimensional. there are two inequivalent K sites. In the first K site, K is bonded in a 8-coordinate geometry to eight O atoms. There are a spread of K–O bond distances ranging from 2.84–3.29 Å. In the second K site, K is bonded to twelve O atoms to form distorted KO12 cuboctahedra that share edges with four equivalent UO7 pentagonal bipyramids and edges with four equivalent SO4 tetrahedra. There are a spread of K–O bond distances ranging from 3.18–3.45 Å. U is bonded to seven O atoms to form distorted UO7 pentagonal bipyramids that share corners with two equivalent UO7 pentagonal bipyramids, corners with three equivalent SO4 tetrahedra, and an edgeedge with one KO12 cuboctahedra. There are a spread of U–O bond distances ranging from 1.82–2.48 Å. V is bonded in a 5-coordinate geometry to five O atoms. There is one shorter (1.63 Å) and four longer (1.89 Å) V–O bond length. S is bonded to four O atoms to form SO4 tetrahedra that share corners with three equivalent UO7 pentagonal bipyramids and an edgeedge with one KO12 cuboctahedra. There are a spread of S–O bond distances ranging from 1.46–1.51 Å. There are nine inequivalent O sites. In the first O site, O is bonded in a single-bond geometry to two equivalent K and one U atom. In the second O site, O is bonded in a 1-coordinate geometry to one K, one U, and one S atom. In the third O site, O is bonded in a single-bond geometry to two K atoms. In the fourth O site, O is bonded in a 3-coordinate geometry to one K, two equivalent U, and one V atom. In the fifth O site, O is bonded in a distorted single-bond geometry to one K, one U, and one S atom. In the sixth O site, O is bonded in a single-bond geometry to one V atom. In the seventh O site, O is bonded in a distorted single-bond geometry to one K and one U atom. In the eighth O site, O is bonded in a distorted single-bond geometry to two equivalent K and one S atom. In the ninth O site, O is bonded in a distorted single-bond geometry to one K, one U, and one S atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K3UO2F5 by Materials Project

K3UO2F5 crystallizes in the tetragonal I4_1/a space group. The structure is three-dimensional. there are three inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 9-coordinate geometry to two equivalent O2- and seven F1- atoms. There are one shorter (3.04 Å) and one longer (3.11 Å) K–O bond lengths. There are a spread of K–F bond distances ranging from 2.64–3.24 Å. In the second K1+ site, K1+ is bonded to four equivalent O2- and four equivalent F1- atoms to form distorted KO4F4 hexagonal bipyramids that share corners with four equivalent UO2F5 pentagonal bipyramids and edges with two equivalent UO2F5 pentagonal bipyramids. All K–O bond lengths are 2.90 Å. All K–F bond lengths are 2.77 Å. In the third K1+ site, K1+ is bonded to six F1- atoms to form KF6 octahedra that share corners with six equivalent UO2F5 pentagonal bipyramids. There are four shorter (2.60 Å) and two longer (2.68 Å) K–F bond lengths. U6+ is bonded to two equivalent O2- and five F1- atoms to form UO2F5 pentagonal bipyramids that share corners with two equivalent KO4F4 hexagonal bipyramids, corners with three equivalent KF6 octahedra, and an edgeedge with one KO4F4 hexagonal bipyramid. The corner-sharing octahedra tilt angles range from 0–35°. Both U–O bond lengths are 1.85 Å. There are a spread of U–F bond distances ranging from 2.27–2.30 Å. O2- is bonded in a distorted single-bond geometry to three K1+ and one U6+ atom. There are three inequivalent F1- sites. In the first F1- site, F1- is bonded in a 5-coordinate geometry to four K1+ and one U6+ atom. In the second F1- site, F1- is bonded in a 2-coordinate geometry to five K1+ and one U6+ atom. In the third F1- site, F1- is bonded to three K1+ and one U6+ atom to form a mixture of distorted edge and corner-sharing FK3U tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K3NpO2F5 by Materials Project

K3NpO2F5 crystallizes in the tetragonal I4_1/a space group. The structure is three-dimensional. there are three inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 9-coordinate geometry to two equivalent O2- and seven F1- atoms. There are one shorter (3.07 Å) and one longer (3.16 Å) K–O bond lengths. There are a spread of K–F bond distances ranging from 2.65–3.23 Å. In the second K1+ site, K1+ is bonded to four equivalent O2- and four equivalent F1- atoms to form distorted KO4F4 hexagonal bipyramids that share corners with four equivalent NpO2F5 pentagonal bipyramids and edges with two equivalent NpO2F5 pentagonal bipyramids. All K–O bond lengths are 2.90 Å. All K–F bond lengths are 2.75 Å. In the third K1+ site, K1+ is bonded to six F1- atoms to form KF6 octahedra that share corners with six equivalent NpO2F5 pentagonal bipyramids. There are four shorter (2.59 Å) and two longer (2.67 Å) K–F bond lengths. Np6+ is bonded to two equivalent O2- and five F1- atoms to form NpO2F5 pentagonal bipyramids that share corners with two equivalent KO4F4 hexagonal bipyramids, corners with three equivalent KF6 octahedra, and an edgeedge with one KO4F4 hexagonal bipyramid. The corner-sharing octahedra tilt angles range from 0–35°. Both Np–O bond lengths are 1.83 Å. There are a spread of Np–F bond distances ranging from 2.25–2.31 Å. O2- is bonded in a distorted single-bond geometry to three K1+ and one Np6+ atom. There are three inequivalent F1- sites. In the first F1- site, F1- is bonded in a 4-coordinate geometry to four K1+ and one Np6+ atom. In the second F1- site, F1- is bonded in a 2-coordinate geometry to five K1+ and one Np6+ atom. In the third F1- site, F1- is bonded to three K1+ and one Np6+ atom to form a mixture of distorted edge and corner-sharing FK3Np tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K2Cd(SeO5)2 by Materials Project

K2Cd(SeO5)2 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are two inequivalent K sites. In the first K site, K is bonded in a 8-coordinate geometry to eight O atoms. There are a spread of K–O bond distances ranging from 2.70–3.16 Å. In the second K site, K is bonded in a 8-coordinate geometry to eight O atoms. There are a spread of K–O bond distances ranging from 2.78–3.20 Å. Cd is bonded to six O atoms to form CdO6 octahedra that share corners with four SeO4 tetrahedra. There are a spread of Cd–O bond distances ranging from 2.26–2.49 Å. There are two inequivalent Se sites. In the first Se site, Se is bonded to four O atoms to form SeO4 tetrahedra that share corners with two equivalent CdO6 octahedra. The corner-sharing octahedra tilt angles range from 43–61°. There are a spread of Se–O bond distances ranging from 1.65–1.70 Å. In the second Se site, Se is bonded to four O atoms to form SeO4 tetrahedra that share corners with two equivalent CdO6 octahedra. The corner-sharing octahedra tilt angles range from 51–57°. There are a spread of Se–O bond distances ranging from 1.66–1.70 Å. There are ten inequivalent O sites. In the first O site, O is bonded in a 3-coordinate geometry to two equivalent K and one Se atom. In the second O site, O is bonded in a 3-coordinate geometry to two equivalent K and one Se atom. In the third O site, O is bonded in a 4-coordinate geometry to two equivalent K, one Cd, and one Se atom. In the fourth O site, O is bonded in a 4-coordinate geometry to two equivalent K, one Cd, and one Se atom. In the fifth O site, O is bonded to two K, one Cd, and one Se atom to form a mixture of distorted corner and edge-sharing OK2CdSe tetrahedra. In the sixth O site, O is bonded to two K, one Cd, and one Se atom to form a mixture of distorted corner and edge-sharing OK2CdSe tetrahedra. In the seventh O site, O is bonded in a distorted single-bond geometry to one K and one Se atom. In the eighth O site, O is bonded in a distorted single-bond geometry to two K and one Se atom. In the ninth O site, O is bonded in a single-bond geometry to one Cd atom. In the tenth O site, O is bonded in a water-like geometry to one K and one Cd atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K9Bi(PS4)4 by Materials Project

K9Bi(PS4)4 crystallizes in the orthorhombic P2_12_12 space group. The structure is three-dimensional. there are five inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 8-coordinate geometry to eight S2- atoms. There are a spread of K–S bond distances ranging from 3.22–3.78 Å. In the second K1+ site, K1+ is bonded in a 8-coordinate geometry to eight S2- atoms. There are a spread of K–S bond distances ranging from 3.25–3.68 Å. In the third K1+ site, K1+ is bonded in a 4-coordinate geometry to eight S2- atoms. There are a spread of K–S bond distances ranging from 3.27–3.87 Å. In the fourth K1+ site, K1+ is bonded to eight S2- atoms to form distorted KS8 hexagonal bipyramids that share corners with eight KS8 hexagonal bipyramids, an edgeedge with one BiS6 octahedra, and edges with four PS4 tetrahedra. There are a spread of K–S bond distances ranging from 3.24–3.76 Å. In the fifth K1+ site, K1+ is bonded to eight S2- atoms to form distorted KS8 hexagonal bipyramids that share corners with eight equivalent KS8 hexagonal bipyramids, edges with two equivalent BiS6 octahedra, and edges with four PS4 tetrahedra. There are a spread of K–S bond distances ranging from 3.25–3.46 Å. Bi3+ is bonded to six S2- atoms to form BiS6 octahedra that share corners with two equivalent PS4 tetrahedra, edges with four KS8 hexagonal bipyramids, and edges with two equivalent PS4 tetrahedra. There are four shorter (2.86 Å) and two longer (2.91 Å) Bi–S bond lengths. There are two inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four S2- atoms to form PS4 tetrahedra that share edges with three KS8 hexagonal bipyramids and an edgeedge with one BiS6 octahedra. There are a spread of P–S bond distances ranging from 2.03–2.09 Å. In the second P5+ site, P5+ is bonded to four S2- atoms to form PS4 tetrahedra that share a cornercorner with one BiS6 octahedra and edges with three KS8 hexagonal bipyramids. The corner-sharing octahedral tilt angles are 71°. There are a spread of P–S bond distances ranging from 2.04–2.11 Å. There are eight inequivalent S2- sites. In the first S2- site, S2- is bonded in a 6-coordinate geometry to four K1+, one Bi3+, and one P5+ atom. In the second S2- site, S2- is bonded in a 1-coordinate geometry to six K1+ and one P5+ atom. In the third S2- site, S2- is bonded in a 1-coordinate geometry to five K1+ and one P5+ atom. In the fourth S2- site, S2- is bonded in a 1-coordinate geometry to four K1+, one Bi3+, and one P5+ atom. In the fifth S2- site, S2- is bonded to five K1+ and one P5+ atom to form distorted edge-sharing SK5P octahedra. In the sixth S2- site, S2- is bonded in a 1-coordinate geometry to five K1+ and one P5+ atom. In the seventh S2- site, S2- is bonded in a 1-coordinate geometry to three K1+, one Bi3+, and one P5+ atom. In the eighth S2- site, S2- is bonded in a 4-coordinate geometry to four K1+ and one P5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K2PdN2(ClO2)2 by Materials Project

K2PdN2(O2Cl)2 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded to five O2- and three Cl1- atoms to form distorted edge-sharing KCl3O5 hexagonal bipyramids. There are a spread of K–O bond distances ranging from 2.90–3.03 Å. There are a spread of K–Cl bond distances ranging from 3.16–3.25 Å. In the second K1+ site, K1+ is bonded to five O2- and three Cl1- atoms to form distorted edge-sharing KCl3O5 hexagonal bipyramids. There are a spread of K–O bond distances ranging from 2.89–3.02 Å. There are a spread of K–Cl bond distances ranging from 3.16–3.24 Å. Pd2+ is bonded in a distorted rectangular see-saw-like geometry to two N3+ and two Cl1- atoms. Both Pd–N bond lengths are 2.07 Å. Both Pd–Cl bond lengths are 2.34 Å. There are two inequivalent N3+ sites. In the first N3+ site, N3+ is bonded in a bent 120 degrees geometry to one Pd2+ and two O2- atoms. There is one shorter (1.25 Å) and one longer (1.26 Å) N–O bond length. In the second N3+ site, N3+ is bonded in a bent 120 degrees geometry to one Pd2+ and two O2- atoms. There is one shorter (1.25 Å) and one longer (1.26 Å) N–O bond length. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to two K1+ and one N3+ atom. In the second O2- site, O2- is bonded in a 1-coordinate geometry to three K1+ and one N3+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to three K1+ and one N3+ atom. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to two K1+ and one N3+ atom. There are two inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a 4-coordinate geometry to three K1+ and one Pd2+ atom. In the second Cl1- site, Cl1- is bonded in a 4-coordinate geometry to three K1+ and one Pd2+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K2Se2O by Materials Project

K2Se2O crystallizes in the monoclinic C2/c space group. The structure is one-dimensional and consists of two K2Se2O ribbons oriented in the (0, 0, 1) direction. K is bonded in a 2-coordinate geometry to two equivalent O atoms. There are one shorter (2.71 Å) and one longer (2.82 Å) K–O bond lengths. Se is bonded in a distorted single-bond geometry to one O atom. The Se–O bond length is 2.08 Å. O is bonded to four equivalent K and two equivalent Se atoms to form distorted edge-sharing OK4Se2 pentagonal pyramids.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K3Nb2S11 by Materials Project

K3Nb2S11 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are twelve inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 9-coordinate geometry to nine S+1.18- atoms. There are a spread of K–S bond distances ranging from 3.33–3.67 Å. In the second K1+ site, K1+ is bonded in a 9-coordinate geometry to nine S+1.18- atoms. There are a spread of K–S bond distances ranging from 3.31–3.67 Å. In the third K1+ site, K1+ is bonded in a 9-coordinate geometry to nine S+1.18- atoms. There are a spread of K–S bond distances ranging from 3.31–3.64 Å. In the fourth K1+ site, K1+ is bonded in a 8-coordinate geometry to ten S+1.18- atoms. There are a spread of K–S bond distances ranging from 3.32–3.82 Å. In the fifth K1+ site, K1+ is bonded in a 8-coordinate geometry to ten S+1.18- atoms. There are a spread of K–S bond distances ranging from 3.31–3.81 Å. In the sixth K1+ site, K1+ is bonded to eight S+1.18- atoms to form a mixture of distorted edge and corner-sharing KS8 hexagonal bipyramids. There are a spread of K–S bond distances ranging from 3.29–3.73 Å. In the seventh K1+ site, K1+ is bonded in a 8-coordinate geometry to ten S+1.18- atoms. There are a spread of K–S bond distances ranging from 3.31–3.84 Å. In the eighth K1+ site, K1+ is bonded to eight S+1.18- atoms to form a mixture of distorted edge and corner-sharing KS8 hexagonal bipyramids. There are a spread of K–S bond distances ranging from 3.28–3.73 Å. In the ninth K1+ site, K1+ is bonded in a 8-coordinate geometry to ten S+1.18- atoms. There are a spread of K–S bond distances ranging from 3.29–3.83 Å. In the tenth K1+ site, K1+ is bonded to eight S+1.18- atoms to form a mixture of distorted edge and corner-sharing KS8 hexagonal bipyramids. There are a spread of K–S bond distances ranging from 3.28–3.68 Å. In the eleventh K1+ site, K1+ is bonded to eight S+1.18- atoms to form a mixture of distorted edge and corner-sharing KS8 hexagonal bipyramids. There are a spread of K–S bond distances ranging from 3.28–3.74 Å. In the twelfth K1+ site, K1+ is bonded in a 9-coordinate geometry to nine S+1.18- atoms. There are a spread of K–S bond distances ranging from 3.32–3.68 Å. There are eight inequivalent Nb5+ sites. In the first Nb5+ site, Nb5+ is bonded in a 7-coordinate geometry to seven S+1.18- atoms. There are a spread of Nb–S bond distances ranging from 2.25–2.96 Å. In the second Nb5+ site, Nb5+ is bonded in a 7-coordinate geometry to seven S+1.18- atoms. There are a spread of Nb–S bond distances ranging from 2.23–2.98 Å. In the third Nb5+ site, Nb5+ is bonded in a 7-coordinate geometry to seven S+1.18- atoms. There are a spread of Nb–S bond distances ranging from 2.26–2.95 Å. In the fourth Nb5+ site, Nb5+ is bonded in a 7-coordinate geometry to seven S+1.18- atoms. There are a spread of Nb–S bond distances ranging from 2.26–2.95 Å. In the fifth Nb5+ site, Nb5+ is bonded in a 7-coordinate geometry to seven S+1.18- atoms. There are a spread of Nb–S bond distances ranging from 2.23–3.00 Å. In the sixth Nb5+ site, Nb5+ is bonded in a 7-coordinate geometry to seven S+1.18- atoms. There are a spread of Nb–S bond distances ranging from 2.23–2.99 Å. In the seventh Nb5+ site, Nb5+ is bonded in a 7-coordinate geometry to seven S+1.18- atoms. There are a spread of Nb–S bond distances ranging from 2.26–2.95 Å. In the eighth Nb5+ site, Nb5+ is bonded in a 7-coordinate geometry to seven S+1.18- atoms. There are a spread of Nb–S bond distances ranging from 2.25–2.98 Å. There are forty-four inequivalent S+1.18- sites. In the first S+1.18- site, S+1.18- is bonded in a 4-coordinate geometry to two K1+, one Nb5+, and one S+1.18- atom. The S–S bond length is 2.08 Å. In the second S+1.18- site, S+1.18- is bonded in a 1-coordinate geometry to two K1+, one Nb5+, and one S+1.18- atom. The S–S bond length is 2.08 Å. In the third S+1.18- site, S+1.18- is bonded in a 1-coordinate geometry to two K1+ and two Nb5+ atoms. In the fourth S+1.18- site, S+1.18- is bonded in a distorted single-bond geometry to four K1+ and one Nb5+ atom. In the fifth S+1.18- site, S+1.18- is bonded in a 4-coordinate geometry to two K1+, one Nb5+, and one S+1.18- atom. The S–S bond length is 2.08 Å. In the sixth S+1.18- site, S+1.18- is bonded in a 1-coordinate geometry to two K1+ and one Nb5+ atom. In the seventh S+1.18- site, S+1.18- is bonded in a 1-coordinate geometry to two K1+ and two Nb5+ atoms. In the eighth S+1.18- site, S+1.18- is bonded in a 1-coordinate geometry to three K1+ and one Nb5+ atom. In the ninth S+1.18- site, S+1.18- is bonded in a 1-coordinate geometry to two K1+, one Nb5+, and one S+1.18- atom. The S–S bond length is 2.08 Å. In the tenth S+1.18- site, S+1.18- is bonded in a 2-coordinate geometry to two K1+, two Nb5+, and one S+1.18- atom. In the eleventh S+1.18- site, S+1.18- is bonded in a 4-coordinate geometry to two K1+, one Nb5+, and one S+1.18- atom. The S–S bond length is 2.08 Å. In the twelfth S+1.18- site, S+1.18- is bonded in a 1-coordinate geometry to two K1+, two Nb5+, and one S+1.18- atom. The S–S bond length is 2.08 Å. In the thirteenth S+1.18- site, S+1.18- is bonded in a 4-coordinate geometry to three K1+, one Nb5+, and one S+1.18- atom. In the fourteenth S+1.18- site, S+1.18- is bonded in a 4-coordinate geometry to three K1+ and one Nb5+ atom. In the fifteenth S+1.18- site, S+1.18- is bonded in a 1-coordinate geometry to two K1+, one Nb5+, and one S+1.18- atom. In the sixteenth S+1.18- site, S+1.18- is bonded in a 1-coordinate geometry to two K1+, two Nb5+, and one S+1.18- atom. The S–S bond length is 2.09 Å. In the seventeenth S+1.18- site, S+1.18- is bonded in a 2-coordinate geometry to two K1+, two Nb5+, and one S+1.18- atom. The S–S bond length is 2.08 Å. In the eighteenth S+1.18- site, S+1.18- is bonded in a 1-coordinate geometry to two K1+, one Nb5+, and one S+1.18- atom. The S–S bond length is 2.08 Å. In the nineteenth S+1.18- site, S+1.18- is bonded in a 1-coordinate geometry to three K1+, one Nb5+, and one S+1.18- atom. The S–S bond length is 2.09 Å. In the twentieth S+1.18- site, S+1.18- is bonded in a 4-coordinate geometry to three K1+, one Nb5+, and one S+1.18- atom. The S–S bond length is 2.09 Å. In the twenty-first S+1.18- site, S+1.18- is bonded in a 1-coordinate geometry to two K1+ and two Nb5+ atoms. In the twenty-second S+1.18- site, S+1.18- is bonded in a 4-coordinate geometry to two K1+, one Nb5+, and one S+1.18- atom. In the twenty-third S+1.18- site, S+1.18- is bonded in a 2-coordinate geometry to two K1+, two Nb5+, and one S+1.18- atom. In the twenty-fourth S+1.18- site, S+1.18- is bonded in a 1-coordinate geometry to two K1+ and one Nb5+ atom. In the twenty-fifth S+1.18- site, S+1.18- is bonded in a 1-coordinate geometry to two K1+, two Nb5+, and one S+1.18- atom. In the twenty-sixth S+1.18- site, S+1.18- is bonded in a distorted single-bond geometry to four K1+ and one Nb5+ atom. In the twenty-seventh S+1.18- site, S+1.18- is bonded in a 1-coordinate geometry to two K1+, one Nb5+, and one S+1.18- atom. In the twenty-eighth S+1.18- site, S+1.18- is bonded in a 4-coordinate geometry to three K1+, one Nb5+, and one S+1.18- atom. In the twenty-ninth S+1.18- site, S+1.18- is bonded in a 1-coordinate geometry to two K1+, one Nb5+, and one S+1.18- atom. The S–S bond length is 2.08 Å. In the thirtieth S+1.18- site, S+1.18- is bonded in a 1-coordinate geometry to two K1+, one Nb5+, and one S+1.18- atom. In the thirty-first S+1.18- site, S+1.18- is bonded in a distorted single-bond geometry to four K1+ and one Nb5+ atom. In the thirty-second S+1.18- site, S+1.18- is bonded in a 1-coordinate geometry to two K1+ and one Nb5+ atom. In the thirty-third S+1.18- site, S+1.18- is bonded in a 1-coordinate geometry to two K1+ and two Nb5+ atoms. In the thirty-fourth S+1.18- site, S+1.18- is bonded in a 1-coordinate geometry to three K1+ and one Nb5+ atom. In the thirty-fifth S+1.18- site, S+1.18- is bonded in a 1-coordinate geometry to two K1+, two Nb5+, and one S+1.18- atom. In the thirty-sixth S+1.18- site, S+1.18- is bonded in a 1-coordinate geometry to three K1+ and one Nb5+ atom. In the thirty-seventh S+1.18- site, S+1.18- is bonded in a distorted single-bond geometry to four K1+ and one Nb5+ atom. In the thirty-eighth S+1.18- site, S+1.18- is bonded in a 4-coordinate geometry to three K1+ and one Nb5+ atom. In the thirty-ninth S+1.18- site, S+1.18- is bonded in a 1-coordinate geometry to two K1+ and one Nb5+ atom. In the fortieth S+1.18- site, S+1.18- is bonded in a 1-coordinate geometry to two K1+, one Nb5+, and one S+1.18- atom. In the forty-first S+1.18- site, S+1.18- is bonded in a 2-coordinate geometry to two K1+, two Nb5+, and one S+1.18- atom. In the forty-second S+1.18- site, S+1.18- is bonded in a 1-coordinate geometry to three K1+ and one Nb5+ atom. In the forty-third S+1.18- site, S+1.18- is bonded in a distorted rectangular see-saw-like geometry to three K1+ and one Nb5+ atom. In the forty-fourth S+1.18- site, S+1.18- is bonded in a 4-coordinate geometry to three K1+ and one Nb5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K2Ga2Sb3 by Materials Project

K2Ga2Sb3 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are four inequivalent K1+ sites. In the first K1+ site, K1+ is bonded to six Sb+2.67- atoms to form distorted KSb6 pentagonal pyramids that share corners with eight GaSb4 tetrahedra, edges with three KSb6 pentagonal pyramids, and edges with four GaSb4 tetrahedra. There are a spread of K–Sb bond distances ranging from 3.50–3.78 Å. In the second K1+ site, K1+ is bonded to six Sb+2.67- atoms to form distorted KSb6 pentagonal pyramids that share corners with eight GaSb4 tetrahedra, edges with three KSb6 pentagonal pyramids, and edges with four GaSb4 tetrahedra. There are a spread of K–Sb bond distances ranging from 3.50–3.95 Å. In the third K1+ site, K1+ is bonded in a 4-coordinate geometry to seven Sb+2.67- atoms. There are a spread of K–Sb bond distances ranging from 3.59–4.16 Å. In the fourth K1+ site, K1+ is bonded in a 2-coordinate geometry to seven Sb+2.67- atoms. There are a spread of K–Sb bond distances ranging from 3.41–4.20 Å. There are four inequivalent Ga3+ sites. In the first Ga3+ site, Ga3+ is bonded to four Sb+2.67- atoms to form GaSb4 tetrahedra that share corners with four KSb6 pentagonal pyramids, corners with five GaSb4 tetrahedra, edges with two KSb6 pentagonal pyramids, and an edgeedge with one GaSb4 tetrahedra. There are a spread of Ga–Sb bond distances ranging from 2.69–2.83 Å. In the second Ga3+ site, Ga3+ is bonded to four Sb+2.67- atoms to form GaSb4 tetrahedra that share corners with four KSb6 pentagonal pyramids, corners with five GaSb4 tetrahedra, edges with two equivalent KSb6 pentagonal pyramids, and an edgeedge with one GaSb4 tetrahedra. There are a spread of Ga–Sb bond distances ranging from 2.73–2.75 Å. In the third Ga3+ site, Ga3+ is bonded to four Sb+2.67- atoms to form GaSb4 tetrahedra that share corners with four KSb6 pentagonal pyramids, corners with five GaSb4 tetrahedra, edges with two KSb6 pentagonal pyramids, and an edgeedge with one GaSb4 tetrahedra. There are a spread of Ga–Sb bond distances ranging from 2.69–2.76 Å. In the fourth Ga3+ site, Ga3+ is bonded to four Sb+2.67- atoms to form GaSb4 tetrahedra that share corners with four KSb6 pentagonal pyramids, corners with five GaSb4 tetrahedra, edges with two equivalent KSb6 pentagonal pyramids, and an edgeedge with one GaSb4 tetrahedra. There are a spread of Ga–Sb bond distances ranging from 2.75–2.79 Å. There are six inequivalent Sb+2.67- sites. In the first Sb+2.67- site, Sb+2.67- is bonded in a 3-coordinate geometry to five K1+ and three Ga3+ atoms. In the second Sb+2.67- site, Sb+2.67- is bonded to four K1+ and three Ga3+ atoms to form edge-sharing SbK4Ga3 pentagonal bipyramids. In the third Sb+2.67- site, Sb+2.67- is bonded to four K1+ and three Ga3+ atoms to form distorted edge-sharing SbK4Ga3 pentagonal pyramids. In the fourth Sb+2.67- site, Sb+2.67- is bonded in a 7-coordinate geometry to four K1+, two Ga3+, and one Sb+2.67- atom. The Sb–Sb bond length is 2.89 Å. In the fifth Sb+2.67- site, Sb+2.67- is bonded in a 8-coordinate geometry to five K1+ and three Ga3+ atoms. In the sixth Sb+2.67- site, Sb+2.67- is bonded in a 7-coordinate geometry to four K1+, two Ga3+, and one Sb+2.67- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K2Al2Sb3 by Materials Project

K2Al2Sb3 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are four inequivalent K1+ sites. In the first K1+ site, K1+ is bonded to six Sb+2.67- atoms to form distorted KSb6 pentagonal pyramids that share corners with eight AlSb4 tetrahedra, edges with three KSb6 pentagonal pyramids, and edges with four AlSb4 tetrahedra. There are a spread of K–Sb bond distances ranging from 3.51–3.81 Å. In the second K1+ site, K1+ is bonded to six Sb+2.67- atoms to form distorted KSb6 pentagonal pyramids that share corners with eight AlSb4 tetrahedra, edges with three KSb6 pentagonal pyramids, and edges with four AlSb4 tetrahedra. There are a spread of K–Sb bond distances ranging from 3.49–3.93 Å. In the third K1+ site, K1+ is bonded in a 5-coordinate geometry to five Sb+2.67- atoms. There are a spread of K–Sb bond distances ranging from 3.59–3.82 Å. In the fourth K1+ site, K1+ is bonded in a 2-coordinate geometry to seven Sb+2.67- atoms. There are a spread of K–Sb bond distances ranging from 3.40–4.19 Å. There are four inequivalent Al3+ sites. In the first Al3+ site, Al3+ is bonded to four Sb+2.67- atoms to form AlSb4 tetrahedra that share corners with four KSb6 pentagonal pyramids, corners with five AlSb4 tetrahedra, edges with two KSb6 pentagonal pyramids, and an edgeedge with one AlSb4 tetrahedra. There are a spread of Al–Sb bond distances ranging from 2.70–2.81 Å. In the second Al3+ site, Al3+ is bonded to four Sb+2.67- atoms to form AlSb4 tetrahedra that share corners with four KSb6 pentagonal pyramids, corners with five AlSb4 tetrahedra, edges with two equivalent KSb6 pentagonal pyramids, and an edgeedge with one AlSb4 tetrahedra. There are a spread of Al–Sb bond distances ranging from 2.73–2.75 Å. In the third Al3+ site, Al3+ is bonded to four Sb+2.67- atoms to form AlSb4 tetrahedra that share corners with four KSb6 pentagonal pyramids, corners with five AlSb4 tetrahedra, edges with two KSb6 pentagonal pyramids, and an edgeedge with one AlSb4 tetrahedra. There are a spread of Al–Sb bond distances ranging from 2.70–2.76 Å. In the fourth Al3+ site, Al3+ is bonded to four Sb+2.67- atoms to form AlSb4 tetrahedra that share corners with four KSb6 pentagonal pyramids, corners with five AlSb4 tetrahedra, edges with two equivalent KSb6 pentagonal pyramids, and an edgeedge with one AlSb4 tetrahedra. There are a spread of Al–Sb bond distances ranging from 2.75–2.79 Å. There are six inequivalent Sb+2.67- sites. In the first Sb+2.67- site, Sb+2.67- is bonded in a 3-coordinate geometry to three K1+ and three Al3+ atoms. In the second Sb+2.67- site, Sb+2.67- is bonded to four K1+ and three Al3+ atoms to form distorted edge-sharing SbK4Al3 pentagonal bipyramids. In the third Sb+2.67- site, Sb+2.67- is bonded in a 6-coordinate geometry to four K1+ and three Al3+ atoms. In the fourth Sb+2.67- site, Sb+2.67- is bonded in a 7-coordinate geometry to four K1+, two Al3+, and one Sb+2.67- atom. The Sb–Sb bond length is 2.92 Å. In the fifth Sb+2.67- site, Sb+2.67- is bonded in a 3-coordinate geometry to five K1+ and three Al3+ atoms. In the sixth Sb+2.67- site, Sb+2.67- is bonded in a 7-coordinate geometry to four K1+, two Al3+, and one Sb+2.67- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K3Sb by Materials Project

K3Sb is alpha bismuth trifluoride structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a body-centered cubic geometry to eight equivalent K1+ atoms. All K–K bond lengths are 3.71 Å. In the second K1+ site, K1+ is bonded to four equivalent K1+ and four equivalent Sb3- atoms to form a mixture of corner, edge, and face-sharing KK4Sb4 tetrahedra. All K–Sb bond lengths are 3.71 Å. Sb3- is bonded in a body-centered cubic geometry to eight equivalent K1+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on KCd4P3 by Materials Project

KCd4P3 crystallizes in the trigonal R-3m space group. The structure is three-dimensional. K1+ is bonded to six equivalent P3- atoms to form KP6 octahedra that share corners with six equivalent CdP4 tetrahedra and edges with six equivalent KP6 octahedra. All K–P bond lengths are 3.38 Å. There are two inequivalent Cd2+ sites. In the first Cd2+ site, Cd2+ is bonded in a distorted trigonal planar geometry to three equivalent P3- atoms. All Cd–P bond lengths are 2.60 Å. In the second Cd2+ site, Cd2+ is bonded to four P3- atoms to form CdP4 tetrahedra that share corners with three equivalent KP6 octahedra, corners with nine equivalent CdP4 tetrahedra, and edges with three equivalent CdP4 tetrahedra. The corner-sharing octahedral tilt angles are 49°. There are one shorter (2.61 Å) and three longer (2.79 Å) Cd–P bond lengths. There are two inequivalent P3- sites. In the first P3- site, P3- is bonded in a 7-coordinate geometry to three equivalent K1+ and four Cd2+ atoms. In the second P3- site, P3- is bonded in a 8-coordinate geometry to six equivalent Cd2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K3(PbCl4)2 by Materials Project

K3(PbCl4)2 is beta indium sulfide-derived structured and crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are three inequivalent K sites. In the first K site, K is bonded to six Cl atoms to form KCl6 octahedra that share corners with six equivalent KCl6 octahedra, edges with two equivalent KCl6 octahedra, and edges with four PbCl6 octahedra. The corner-sharing octahedra tilt angles range from 14–18°. There are a spread of K–Cl bond distances ranging from 3.20–3.25 Å. In the second K site, K is bonded to six Cl atoms to form KCl6 octahedra that share edges with four KCl6 octahedra and edges with four PbCl6 octahedra. There are a spread of K–Cl bond distances ranging from 3.08–3.28 Å. In the third K site, K is bonded to six Cl atoms to form KCl6 octahedra that share corners with six equivalent KCl6 octahedra, edges with two equivalent KCl6 octahedra, and edges with four PbCl6 octahedra. The corner-sharing octahedra tilt angles range from 14–18°. There are a spread of K–Cl bond distances ranging from 3.15–3.25 Å. There are two inequivalent Pb sites. In the first Pb site, Pb is bonded to six Cl atoms to form PbCl6 octahedra that share edges with two equivalent PbCl6 octahedra and edges with six KCl6 octahedra. There are a spread of Pb–Cl bond distances ranging from 2.85–2.98 Å. In the second Pb site, Pb is bonded to six Cl atoms to form PbCl6 octahedra that share edges with two equivalent PbCl6 octahedra and edges with six KCl6 octahedra. There are a spread of Pb–Cl bond distances ranging from 2.72–2.82 Å. There are four inequivalent Cl sites. In the first Cl site, Cl is bonded in a see-saw-like geometry to three K and one Pb atom. In the second Cl site, Cl is bonded to three K and one Pb atom to form corner-sharing ClK3Pb trigonal pyramids. In the third Cl site, Cl is bonded in a rectangular see-saw-like geometry to two K and two Pb atoms. In the fourth Cl site, Cl is bonded in a distorted T-shaped geometry to one K and two Pb atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on KAg2 by Materials Project

KAg2 is Hexagonal Laves structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. K is bonded in a 12-coordinate geometry to twelve Ag atoms. There are a spread of K–Ag bond distances ranging from 3.47–3.58 Å. There are two inequivalent Ag sites. In the first Ag site, Ag is bonded to six equivalent K and six equivalent Ag atoms to form a mixture of edge, face, and corner-sharing AgK6Ag6 cuboctahedra. All Ag–Ag bond lengths are 3.03 Å. In the second Ag site, Ag is bonded to six equivalent K and six Ag atoms to form a mixture of edge, face, and corner-sharing AgK6Ag6 cuboctahedra. There are two shorter (2.93 Å) and two longer (2.98 Å) Ag–Ag bond lengths.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K2O2 by Materials Project

K2O2 is alpha-derived structured and crystallizes in the monoclinic P2_1/m space group. The structure is three-dimensional. K is bonded in a 7-coordinate geometry to seven equivalent O atoms. There are a spread of K–O bond distances ranging from 2.79–2.86 Å. O is bonded to seven equivalent K atoms to form a mixture of distorted face, edge, and corner-sharing OK7 pentagonal bipyramids.

36 MATERIALS SCIENCE↗