Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “Zn(HO)2”

Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 19 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Zn(HO)2 by Materials Project

Zn(OH)2 crystallizes in the trigonal P-3m1 space group. The structure is two-dimensional and consists of one Zn(OH)2 sheet oriented in the (0, 0, 1) direction. Zn2+ is bonded to six equivalent O2- atoms to form edge-sharing ZnO6 octahedra. All Zn–O bond lengths are 2.14 Å. H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. O2- is bonded in a distorted single-bond geometry to three equivalent Zn2+ and one H1+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Zn(HO)2 by Materials Project

Zn(OH)2 crystallizes in the monoclinic C2 space group. The structure is two-dimensional and consists of one Zn(OH)2 sheet oriented in the (0, 0, 1) direction. Zn2+ is bonded to six equivalent O2- atoms to form edge-sharing ZnO6 octahedra. There are a spread of Zn–O bond distances ranging from 2.03–2.37 Å. H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. O2- is bonded in a distorted single-bond geometry to three equivalent Zn2+ and one H1+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Zn(HO)2 by Materials Project

Zn(OH)2 crystallizes in the orthorhombic P2_12_12_1 space group. The structure is three-dimensional. Zn2+ is bonded to four O2- atoms to form corner-sharing ZnO4 tetrahedra. There are a spread of Zn–O bond distances ranging from 1.98–2.00 Å. There are two 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 1.00 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Zn2+ and one H1+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Zn2+ and one H1+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Zn(HO)2 by Materials Project

Zn(OH)2 crystallizes in the orthorhombic P2_12_12_1 space group. The structure is three-dimensional. Zn2+ is bonded to four O2- atoms to form corner-sharing ZnO4 tetrahedra. There are a spread of Zn–O bond distances ranging from 1.97–2.01 Å. There are two 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 1.00 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Zn2+ and one H1+ atom. In the second O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two equivalent Zn2+ and one H1+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Zn(HO)2 by Materials Project

Zn(OH)2 crystallizes in the orthorhombic P2_12_12_1 space group. The structure is three-dimensional. Zn2+ is bonded to four O2- atoms to form distorted corner-sharing ZnO4 tetrahedra. There are a spread of Zn–O bond distances ranging from 1.96–2.05 Å. There are two 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 0.99 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. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two equivalent Zn2+ and one H1+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Zn2+ and one H1+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Zn(HO)2 by Materials Project

Zn(OH)2 crystallizes in the monoclinic P2_1 space group. The structure is three-dimensional. there are two inequivalent Zn2+ sites. In the first Zn2+ site, Zn2+ is bonded to four O2- atoms to form corner-sharing ZnO4 tetrahedra. There are a spread of Zn–O bond distances ranging from 1.98–2.01 Å. In the second Zn2+ site, Zn2+ is bonded to four O2- atoms to form corner-sharing ZnO4 tetrahedra. There are a spread of Zn–O bond distances ranging from 1.98–2.02 Å. There are four 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 1.01 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.01 Å. In the third H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.01 Å. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.01 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to two Zn2+ and one H1+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to two Zn2+ and one H1+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to two Zn2+ and one H1+ atom. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to two Zn2+ and one H1+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Zn(HO)2 by Materials Project

Zn(OH)2 crystallizes in the triclinic P1 space group. The structure is one-dimensional and consists of two Zn(OH)2 ribbons oriented in the (1, 0, 0) direction. In one of the Zn(OH)2 ribbons, there are three inequivalent Zn2+ sites. In the first Zn2+ site, Zn2+ is bonded to four O2- atoms to form corner-sharing ZnO4 tetrahedra. There are a spread of Zn–O bond distances ranging from 1.96–2.04 Å. In the second Zn2+ site, Zn2+ is bonded to four O2- atoms to form corner-sharing ZnO4 tetrahedra. There are a spread of Zn–O bond distances ranging from 1.93–2.06 Å. In the third Zn2+ site, Zn2+ is bonded to four O2- atoms to form corner-sharing ZnO4 tetrahedra. There are a spread of Zn–O bond distances ranging from 1.95–2.06 Å. There are six 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 0.97 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the third H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.01 Å. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.01 Å. In the fifth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. In the sixth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.97 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to two Zn2+ and one H1+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to two Zn2+ and one H1+ atom. In the third O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two equivalent Zn2+ and one H1+ atom. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Zn2+ and one H1+ atom. In the fifth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two equivalent Zn2+ and one H1+ atom. In the sixth O2- site, O2- is bonded in a distorted single-bond geometry to two Zn2+ and one H1+ atom. In one of the Zn(OH)2 ribbons, there are three inequivalent Zn2+ sites. In the first Zn2+ site, Zn2+ is bonded to four O2- atoms to form corner-sharing ZnO4 tetrahedra. There are a spread of Zn–O bond distances ranging from 1.95–2.03 Å. In the second Zn2+ site, Zn2+ is bonded to four O2- atoms to form corner-sharing ZnO4 tetrahedra. There are a spread of Zn–O bond distances ranging from 1.92–2.03 Å. In the third Zn2+ site, Zn2+ is bonded to four O2- atoms to form corner-sharing ZnO4 tetrahedra. There are a spread of Zn–O bond distances ranging from 1.93–2.06 Å. There are six 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 0.99 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.97 Å. In the third H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 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. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to two Zn2+ and one H1+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to two Zn2+ and one H1+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Zn2+ and one H1+ atom. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Zn2+ and one H1+ atom. In the fifth O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Zn2+ and one H1+ atom. In the sixth O2- site, O2- is bonded in a 1-coordinate geometry to two Zn2+ and one H1+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Zn(HO)2 by Materials Project

Zn(OH)2 crystallizes in the triclinic P1 space group. The structure is one-dimensional and consists of two Zn(OH)2 ribbons oriented in the (1, 0, 0) direction. In one of the Zn(OH)2 ribbons, there are three inequivalent Zn2+ sites. In the first Zn2+ site, Zn2+ is bonded to four O2- atoms to form corner-sharing ZnO4 tetrahedra. There are a spread of Zn–O bond distances ranging from 1.93–2.06 Å. In the second Zn2+ site, Zn2+ is bonded to four O2- atoms to form corner-sharing ZnO4 tetrahedra. There are a spread of Zn–O bond distances ranging from 1.94–2.04 Å. In the third Zn2+ site, Zn2+ is bonded to four O2- atoms to form corner-sharing ZnO4 tetrahedra. There are a spread of Zn–O bond distances ranging from 1.92–2.06 Å. There are six 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 0.99 Å. In the third H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.01 Å. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 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. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to two Zn2+ and one H1+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to two Zn2+ and one H1+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Zn2+ and one H1+ atom. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Zn2+ and one H1+ atom. In the fifth O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Zn2+ and one H1+ atom. In the sixth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Zn2+ and one H1+ atom. In one of the Zn(OH)2 ribbons, there are three inequivalent Zn2+ sites. In the first Zn2+ site, Zn2+ is bonded to four O2- atoms to form corner-sharing ZnO4 tetrahedra. There are a spread of Zn–O bond distances ranging from 1.95–2.02 Å. In the second Zn2+ site, Zn2+ is bonded to four O2- atoms to form corner-sharing ZnO4 tetrahedra. There are a spread of Zn–O bond distances ranging from 1.93–2.04 Å. In the third Zn2+ site, Zn2+ is bonded to four O2- atoms to form corner-sharing ZnO4 tetrahedra. There are a spread of Zn–O bond distances ranging from 1.94–2.08 Å. There are six 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 0.99 Å. In the third H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 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. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to two Zn2+ and one H1+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to two Zn2+ and one H1+ atom. In the third O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two equivalent Zn2+ and one H1+ atom. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Zn2+ and one H1+ atom. In the fifth O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Zn2+ and one H1+ atom. In the sixth O2- site, O2- is bonded in a distorted single-bond geometry to two Zn2+ and one H1+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ho2Zn17 by Materials Project

Ho2Zn17 crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Ho is bonded in a 10-coordinate geometry to nineteen Zn atoms. There are a spread of Ho–Zn bond distances ranging from 3.10–3.45 Å. There are four inequivalent Zn sites. In the first Zn site, Zn is bonded to three equivalent Ho and nine Zn atoms to form distorted ZnHo3Zn9 cuboctahedra that share corners with twenty-three ZnHo2Zn10 cuboctahedra, edges with ten ZnHo2Zn10 cuboctahedra, and faces with twenty ZnHo3Zn9 cuboctahedra. There are a spread of Zn–Zn bond distances ranging from 2.54–2.86 Å. In the second Zn site, Zn is bonded in a 2-coordinate geometry to one Ho and thirteen Zn atoms. There are a spread of Zn–Zn bond distances ranging from 2.64–2.98 Å. In the third Zn site, Zn is bonded to two equivalent Ho and ten Zn atoms to form ZnHo2Zn10 cuboctahedra that share corners with twenty-two ZnHo2Zn10 cuboctahedra, edges with ten ZnHo2Zn10 cuboctahedra, and faces with eighteen ZnHo3Zn9 cuboctahedra. All Zn–Zn bond lengths are 2.59 Å. In the fourth Zn site, Zn is bonded to two equivalent Ho and ten Zn atoms to form distorted ZnHo2Zn10 cuboctahedra that share corners with twenty-four ZnHo2Zn10 cuboctahedra, edges with five ZnHo2Zn10 cuboctahedra, and faces with twenty-one ZnHo3Zn9 cuboctahedra. Both Zn–Zn bond lengths are 2.67 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on ZnP2(HO)4 by Materials Project

Zn(H2PO2)2 crystallizes in the orthorhombic Pmma space group. The structure is two-dimensional and consists of one Zn(H2PO2)2 sheet oriented in the (0, 0, 1) direction. Zn2+ is bonded to six O2- atoms to form ZnO6 octahedra that share corners with six PH2O2 tetrahedra and edges with two equivalent ZnO6 octahedra. There are two shorter (2.03 Å) and four longer (2.19 Å) Zn–O bond lengths. There are two inequivalent P1+ sites. In the first P1+ site, P1+ is bonded to two equivalent H1+ and two equivalent O2- atoms to form distorted PH2O2 tetrahedra that share corners with four equivalent ZnO6 octahedra. The corner-sharing octahedral tilt angles are 52°. Both P–H bond lengths are 1.41 Å. Both P–O bond lengths are 1.53 Å. In the second P1+ site, P1+ is bonded to two equivalent H1+ and two equivalent O2- atoms to form distorted PH2O2 tetrahedra that share corners with two equivalent ZnO6 octahedra. The corner-sharing octahedral tilt angles are 50°. Both P–H bond lengths are 1.42 Å. Both P–O bond lengths are 1.53 Å. There are two inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one P1+ atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one P1+ atom. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Zn2+ and one P1+ atom. In the second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Zn2+ and one P1+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ho13(Mg2Zn27)2 by Materials Project

Ho13(Mg2Zn27)2 crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. there are two inequivalent Mg sites. In the first Mg site, Mg is bonded in a 6-coordinate geometry to three equivalent Ho and twelve Zn atoms. All Mg–Ho bond lengths are 3.11 Å. There are six shorter (2.82 Å) and six longer (3.15 Å) Mg–Zn bond lengths. In the second Mg site, Mg is bonded in a body-centered cubic geometry to eight Zn atoms. There are a spread of Mg–Zn bond distances ranging from 2.61–2.71 Å. There are four inequivalent Ho sites. In the first Ho site, Ho is bonded in a 3-coordinate geometry to sixteen Zn atoms. There are a spread of Ho–Zn bond distances ranging from 3.01–3.22 Å. In the second Ho site, Ho is bonded in a 12-coordinate geometry to one Mg and fourteen Zn atoms. There are a spread of Ho–Zn bond distances ranging from 3.00–3.29 Å. In the third Ho site, Ho is bonded in a 11-coordinate geometry to thirteen Zn atoms. There are a spread of Ho–Zn bond distances ranging from 2.96–3.24 Å. In the fourth Ho site, Ho is bonded in a 6-coordinate geometry to fourteen Zn atoms. There are a spread of Ho–Zn bond distances ranging from 2.88–3.49 Å. There are ten inequivalent Zn sites. In the first Zn site, Zn is bonded in a 10-coordinate geometry to four Ho and six Zn atoms. There are a spread of Zn–Zn bond distances ranging from 2.60–2.90 Å. In the second Zn site, Zn is bonded in a 1-coordinate geometry to two Mg, three Ho, and three Zn atoms. There are two shorter (2.62 Å) and one longer (2.63 Å) Zn–Zn bond lengths. In the third Zn site, Zn is bonded in a 9-coordinate geometry to three Ho and six Zn atoms. There are two shorter (2.55 Å) and two longer (2.88 Å) Zn–Zn bond lengths. In the fourth Zn site, Zn is bonded to two equivalent Ho and ten Zn atoms to form face-sharing ZnHo2Zn10 cuboctahedra. There are a spread of Zn–Zn bond distances ranging from 2.59–2.77 Å. In the fifth Zn site, Zn is bonded in a 12-coordinate geometry to four Ho and eight Zn atoms. There are a spread of Zn–Zn bond distances ranging from 2.54–2.97 Å. In the sixth Zn site, Zn is bonded in a 10-coordinate geometry to one Mg, four Ho, and five Zn atoms. There are two shorter (2.57 Å) and one longer (2.59 Å) Zn–Zn bond lengths. In the seventh Zn site, Zn is bonded in a 11-coordinate geometry to five Ho and six equivalent Zn atoms. In the eighth Zn site, Zn is bonded to three equivalent Ho and nine Zn atoms to form face-sharing ZnHo3Zn9 cuboctahedra. All Zn–Zn bond lengths are 2.65 Å. In the ninth Zn site, Zn is bonded in a 1-coordinate geometry to one Mg, three Ho, and five Zn atoms. In the tenth Zn site, Zn is bonded in a 1-coordinate geometry to one Mg, four Ho, and three Zn atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ho8Mg12Zn61 by Materials Project

Mg12Ho8Zn61 is Bergman Structure: Mg32(Al,Zn)49 Bergman-like structured and crystallizes in the cubic Im-3 space group. The structure is three-dimensional. Mg is bonded in a 10-coordinate geometry to one Mg, two equivalent Ho, and twelve Zn atoms. The Mg–Mg bond length is 3.29 Å. Both Mg–Ho bond lengths are 3.37 Å. There are a spread of Mg–Zn bond distances ranging from 2.92–3.29 Å. Ho is bonded in a 12-coordinate geometry to three equivalent Mg, one Ho, and twelve Zn atoms. The Ho–Ho bond length is 3.09 Å. There are a spread of Ho–Zn bond distances ranging from 2.94–3.19 Å. There are six inequivalent Zn sites. In the first Zn site, Zn is bonded in a 12-coordinate geometry to three equivalent Mg, two equivalent Ho, and seven Zn atoms. There are a spread of Zn–Zn bond distances ranging from 2.50–2.80 Å. In the second Zn site, Zn is bonded in a 11-coordinate geometry to two equivalent Mg, two equivalent Ho, and seven Zn atoms. There are a spread of Zn–Zn bond distances ranging from 2.59–3.02 Å. In the third Zn site, Zn is bonded to two equivalent Mg, two equivalent Ho, and eight Zn atoms to form a mixture of distorted face, edge, and corner-sharing ZnHo2Mg2Zn8 cuboctahedra. There are a spread of Zn–Zn bond distances ranging from 2.62–3.01 Å. In the fourth Zn site, Zn is bonded in a cuboctahedral geometry to twelve equivalent Zn atoms. In the fifth Zn site, Zn is bonded to four equivalent Mg and eight Zn atoms to form a mixture of distorted face, edge, and corner-sharing ZnMg4Zn8 cuboctahedra. There are one shorter (2.54 Å) and one longer (2.71 Å) Zn–Zn bond lengths. In the sixth Zn site, Zn is bonded in a 2-coordinate geometry to two equivalent Mg and eleven Zn atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2023

Tuning the Radius Ratio to Enhance Thermoelectric Properties in the Zintl Compounds AM 2 Sb 2 (A = Ba, Sr; M = Zn, Cd)

Five novel Zintl phase solid solutions in the Ba 1–x Sr x Zn 2–y Cd y Sb 2 (0 ≤ x ≤ 0.13(1); 0 ≤ y ≤ 0.32(2)) system were successfully synthesized by the molten Pb metal-flux method, and the powder X-ray diffraction and single-crystal X-ray diffraction analyses proved that all five title compounds adopted the BaCu 2 S 2 -type phase having the orthorhombic Pnma space group (Z = 4, Pearson code oP20) with five crystallographically independent atomic sites. The previously studied BaCu 2 S 2 -type antimonides demonstrated a limited tolerance for doping in contrast to the CaAl 2 Si 2 -type antimonides. To understand the relatively narrower phase width and limited dopability of the title BaCu 2 S 2 -type phase than the CaAl 2 Si 2 -type phase in the overall Ba 1–x Sr x Zn 2–y Cd y Sb 2 system, the radius ratio of cations and anionic elements r + /r – for two structure types were thoroughly investigated. For the first time, the r + /r – ratio was identified as a critical factor for the phase selectivity: (1) r + /r – > 1 favored the BaCu 2 S 2 -type phase, and (2) r + /r – < 1 favored the CaAl 2 Si 2 -type phase. Further, we also revealed the structural transformation mechanism from the more widely observed CaAl 2 Si 2 -type phase to the title BaCu 2 S 2 -type phase as the relatively larger cationic elements were introduced to the system. A series of DFT calculations using the three hypothetical models indicated that a resonance peak near EF in the density of states curves was descended from the relatively flat band structure at several special symmetry points rationalizing the enhanced Seebeck coefficients of Ba 0.94(1) Sr 0.06 Zn 1.86(3) Cd 0.14 Sb 2 and Ba 0.96(1) Sr 0.04 Zn 1.68(2) Cd 0.32 Sb 2 . Electron localization function analysis rationalized the correlation between the polarity change of anionic Zn/Cd–Sb bonds and the charge carrier mobility on the anionic frameworks. Temperature-dependent thermoelectric properties were studied for the four title compounds, and the results proved that the Sr and Cd doping in the title Ba 1–x Sr x Zn 2–y Cd y Sb 2 system successfully enhanced the ZT values through the increased Seebeck coefficients and the reduced total thermal conductivities.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sr2Zn(HO)6 by Materials Project

Sr2Zn(HO3)2(H2)2 crystallizes in the monoclinic P2_1/c space group. The structure is two-dimensional and consists of four hydrogen molecules and one Sr2Zn(HO3)2 sheet oriented in the (-1, 0, 2) direction. In the Sr2Zn(HO3)2 sheet, Sr2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Sr–O bond distances ranging from 2.43–2.60 Å. Zn2+ is bonded in a distorted square co-planar geometry to six O2- atoms. There are a spread of Zn–O bond distances ranging from 1.96–2.57 Å. H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Sr2+, one Zn2+, and one O2- atom. The O–O bond length is 1.54 Å. In the second O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Sr2+, one Zn2+, and one H1+ atom. In the third O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent Sr2+, one Zn2+, and one O2- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ba2Zn(HO)6 by Materials Project

Ba2Zn(HO)6 crystallizes in the monoclinic P2_1/c space group. The structure is two-dimensional and consists of one Ba2Zn(HO)6 sheet oriented in the (-1, 0, 2) direction. Ba2+ is bonded in a 6-coordinate geometry to two H1+ and four O2- atoms. There are one shorter (2.84 Å) and one longer (2.96 Å) Ba–H bond lengths. There are a spread of Ba–O bond distances ranging from 2.50–2.79 Å. Zn2+ is bonded in a square co-planar geometry to four O2- atoms. There are two shorter (1.82 Å) and two longer (2.57 Å) Zn–O bond lengths. There are three inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a distorted water-like geometry to one Ba2+ and one H1+ atom. The H–H bond length is 0.76 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one H1+ atom. In the third H1+ site, H1+ is bonded in a single-bond geometry to one Ba2+ and one O2- atom. The H–O bond length is 0.99 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one Ba2+, one H1+, and one O2- atom. The O–O bond length is 1.50 Å. In the second O2- site, O2- is bonded in a 3-coordinate geometry to one Ba2+, one Zn2+, and one O2- atom. In the third O2- site, O2- is bonded in a trigonal non-coplanar geometry to two equivalent Ba2+ and one Zn2+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2025

Bridging Experiment and Theory to Reveal Compounds in K–Zn(Cd)–Bi Systems

This study investigates the facile hydride synthesis method guided by theoretical predictions to explore the K–T–Bi (T = Zn, Cd) phase spaces. Using an adaptive genetic algorithm (AGA) and density functional theory (DFT), candidate compositions are identified for experimental validation via a facile hydrides route, permitting experimental screening of K–Zn–Bi and “empty” K–Cd–Bi systems. The previously reported KZnBi and KZn 2 Bi 2 are synthesized alongside newly discovered KCdBi and KCd 2 Bi 2 . While the AGA and DFT predict the stability of these compounds, structural predictions align with the experiment only for KZnBi and KZn 2 Bi 2 . Single-crystal X-ray structure refinements confirm that KZnBi and KZn 2 Bi 2 adopt the hexagonal ZrBeSi- and tetragonal ThCr 2 Si 2 -structure types, respectively. KCdBi has tetragonal PbClF-structure type and KCd 2 Bi 2 belongs to the ThCr 2 Si 2 -structure type. A trend based on the ratio of the metal ionic radii allows to rationalize variation in the structure types within the ATBi family (A = Li–Cs), correctly identifying KCdBi as isostructural to NaZnBi. Thermal stability studied by high-temperature powder X-ray diffraction reveals that Zn-containing compounds melt at higher temperatures (821 K for KZn 2 Bi 2 ) than Cd-containing KCd 2 Bi 2 (635 K). This study highlights the efficacy of combining rapid synthesis techniques with predictive modeling, though structural predictions show some limitations in accuracy.

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗