DOI: 10.17188/1690814
title: Materials Data on Ca2ZnSb2 by Materials Project

description: Ca2ZnSb2 crystallizes in the monoclinic Pm space group. The structure is three-dimensional. there are eighteen inequivalent Ca2+ sites. In the first Ca2+ site, Ca2+ is bonded in a 6-coordinate geometry to six Sb3- atoms. There are a spread of Ca–Sb bond distances ranging from 3.13–3.63 Å. In the second Ca2+ site, Ca2+ is bonded in a 6-coordinate geometry to five Sb3- atoms. There are a spread of Ca–Sb bond distances ranging from 3.16–3.27 Å. In the third Ca2+ site, Ca2+ is bonded in a 6-coordinate geometry to six Sb3- atoms. There are a spread of Ca–Sb bond distances ranging from 3.16–3.64 Å. In the fourth Ca2+ site, Ca2+ is bonded in a 6-coordinate geometry to five Sb3- atoms. There are a spread of Ca–Sb bond distances ranging from 3.14–3.28 Å. In the fifth Ca2+ site, Ca2+ is bonded in a 5-coordinate geometry to five Sb3- atoms. There are a spread of Ca–Sb bond distances ranging from 3.17–3.27 Å. In the sixth Ca2+ site, Ca2+ is bonded in a 5-coordinate geometry to five Sb3- atoms. There are a spread of Ca–Sb bond distances ranging from 3.18–3.28 Å. In the seventh Ca2+ site, Ca2+ is bonded to six Sb3- atoms to form distorted CaSb6 octahedra that share corners with ten CaSb6 octahedra, edges with four CaSb6 octahedra, edges with two equivalent ZnSb4 tetrahedra, faces with two CaSb6 octahedra, and faces with two equivalent ZnSb4 tetrahedra. The corner-sharing octahedra tilt angles range from 37–53°. There are a spread of Ca–Sb bond distances ranging from 3.17–3.55 Å. In the eighth Ca2+ site, Ca2+ is bonded to six Sb3- atoms to form distorted CaSb6 octahedra that share corners with ten CaSb6 octahedra, edges with four CaSb6 octahedra, edges with two equivalent ZnSb4 tetrahedra, faces with two CaSb6 octahedra, and faces with two equivalent ZnSb4 tetrahedra. The corner-sharing octahedra tilt angles range from 35–54°. There are a spread of Ca–Sb bond distances ranging from 3.18–3.59 Å. In the ninth Ca2+ site, Ca2+ is bonded to six Sb3- atoms to form CaSb6 octahedra that share corners with eight CaSb6 octahedra, corners with two equivalent ZnSb4 tetrahedra, edges with four CaSb6 octahedra, edges with four ZnSb4 tetrahedra, and a faceface with one CaSb6 octahedra. The corner-sharing octahedra tilt angles range from 37–55°. There are a spread of Ca–Sb bond distances ranging from 3.12–3.32 Å. In the tenth Ca2+ site, Ca2+ is bonded to six Sb3- atoms to form CaSb6 octahedra that share corners with eight CaSb6 octahedra, corners with two equivalent ZnSb4 tetrahedra, edges with four CaSb6 octahedra, edges with four ZnSb4 tetrahedra, and a faceface with one CaSb6 octahedra. The corner-sharing octahedra tilt angles range from 40–54°. There are a spread of Ca–Sb bond distances ranging from 3.19–3.40 Å. In the eleventh Ca2+ site, Ca2+ is bonded to six Sb3- atoms to form CaSb6 octahedra that share corners with eight CaSb6 octahedra, corners with two equivalent ZnSb4 tetrahedra, edges with four CaSb6 octahedra, edges with four ZnSb4 tetrahedra, and a faceface with one CaSb6 octahedra. The corner-sharing octahedra tilt angles range from 37–54°. There are a spread of Ca–Sb bond distances ranging from 3.19–3.37 Å. In the twelfth Ca2+ site, Ca2+ is bonded to six Sb3- atoms to form CaSb6 octahedra that share corners with eight CaSb6 octahedra, corners with two equivalent ZnSb4 tetrahedra, edges with four CaSb6 octahedra, edges with four ZnSb4 tetrahedra, and a faceface with one CaSb6 octahedra. The corner-sharing octahedra tilt angles range from 35–57°. There are a spread of Ca–Sb bond distances ranging from 3.17–3.41 Å. In the thirteenth Ca2+ site, Ca2+ is bonded to six Sb3- atoms to form CaSb6 octahedra that share corners with eight CaSb6 octahedra, corners with six ZnSb4 tetrahedra, edges with two equivalent CaSb6 octahedra, edges with two ZnSb4 tetrahedra, and faces with two CaSb6 octahedra. The corner-sharing octahedra tilt angles range from 41–50°. There are a spread of Ca–Sb bond distances ranging from 3.26–3.37 Å. In the fourteenth Ca2+ site, Ca2+ is bonded to six Sb3- atoms to form CaSb6 octahedra that share corners with eight CaSb6 octahedra, corners with six ZnSb4 tetrahedra, edges with six CaSb6 octahedra, edges with two ZnSb4 tetrahedra, and faces with two CaSb6 octahedra. The corner-sharing octahedra tilt angles range from 43–50°. There are a spread of Ca–Sb bond distances ranging from 3.16–3.44 Å. In the fifteenth Ca2+ site, Ca2+ is bonded to six Sb3- atoms to form distorted CaSb6 octahedra that share corners with nine CaSb6 octahedra, corners with six ZnSb4 tetrahedra, edges with four CaSb6 octahedra, an edgeedge with one ZnSb4 tetrahedra, a faceface with one CaSb6 octahedra, and a faceface with one ZnSb4 tetrahedra. The corner-sharing octahedra tilt angles range from 1–57°. There are a spread of Ca–Sb bond distances ranging from 3.21–3.48 Å. In the sixteenth Ca2+ site, Ca2+ is bonded to six Sb3- atoms to form CaSb6 octahedra that share corners with nine CaSb6 octahedra, corners with six ZnSb4 tetrahedra, edges with four CaSb6 octahedra, an edgeedge with one ZnSb4 tetrahedra, a faceface with one CaSb6 octahedra, and a faceface with one ZnSb4 tetrahedra. The corner-sharing octahedra tilt angles range from 1–54°. There are a spread of Ca–Sb bond distances ranging from 3.21–3.52 Å. In the seventeenth Ca2+ site, Ca2+ is bonded to six Sb3- atoms to form CaSb6 octahedra that share corners with seven CaSb6 octahedra, corners with six ZnSb4 tetrahedra, edges with four CaSb6 octahedra, an edgeedge with one ZnSb4 tetrahedra, a faceface with one CaSb6 octahedra, and a faceface with one ZnSb4 tetrahedra. The corner-sharing octahedra tilt angles range from 1–54°. There are a spread of Ca–Sb bond distances ranging from 3.22–3.49 Å. In the eighteenth Ca2+ site, Ca2+ is bonded to six Sb3- atoms to form CaSb6 octahedra that share corners with seven CaSb6 octahedra, corners with six ZnSb4 tetrahedra, edges with four CaSb6 octahedra, an edgeedge with one ZnSb4 tetrahedra, a faceface with one CaSb6 octahedra, and a faceface with one ZnSb4 tetrahedra. The corner-sharing octahedra tilt angles range from 1–55°. There are a spread of Ca–Sb bond distances ranging from 3.23–3.45 Å. There are nine inequivalent Zn2+ sites. In the first Zn2+ site, Zn2+ is bonded to four Sb3- atoms to form ZnSb4 tetrahedra that share corners with seven CaSb6 octahedra, corners with four ZnSb4 tetrahedra, an edgeedge with one CaSb6 octahedra, and a faceface with one CaSb6 octahedra. The corner-sharing octahedra tilt angles range from 34–59°. There are a spread of Zn–Sb bond distances ranging from 2.68–2.95 Å. In the second Zn2+ site, Zn2+ is bonded to four Sb3- atoms to form ZnSb4 tetrahedra that share corners with seven CaSb6 octahedra, corners with four ZnSb4 tetrahedra, an edgeedge with one CaSb6 octahedra, and a faceface with one CaSb6 octahedra. The corner-sharing octahedra tilt angles range from 35–60°. There are a spread of Zn–Sb bond distances ranging from 2.69–2.96 Å. In the third Zn2+ site, Zn2+ is bonded to four Sb3- atoms to form ZnSb4 tetrahedra that share corners with seven CaSb6 octahedra, corners with four ZnSb4 tetrahedra, edges with three CaSb6 octahedra, and a faceface with one CaSb6 octahedra. The corner-sharing octahedra tilt angles range from 31–61°. There are a spread of Zn–Sb bond distances ranging from 2.66–2.86 Å. In the fourth Zn2+ site, Zn2+ is bonded to four Sb3- atoms to form ZnSb4 tetrahedra that share corners with seven CaSb6 octahedra, corners with four ZnSb4 tetrahedra, edges with three CaSb6 octahedra, and a faceface with one CaSb6 octahedra. The corner-sharing octahedra tilt angles range from 32–61°. There are a spread of Zn–Sb bond distances ranging from 2.71–2.96 Å. In the fifth Zn2+ site, Zn2+ is bonded to four Sb3- atoms to form ZnSb4 tetrahedra that share corners with four CaSb6 octahedra, corners with three ZnSb4 tetrahedra, and edges with five CaSb6 octahedra. The corner-sharing octahedra tilt angles range from 17–54°. There are a spread of Zn–Sb bond distances ranging from 2.76–2.84 Å. In the sixth Zn2+ site, Zn2+ is bonded to four Sb3- atoms to form ZnSb4 tetrahedra that share corners with four CaSb6 octahedra, corners with three ZnSb4 tetrahedra, and edges with five CaSb6 octahedra. The corner-sharing octahedra tilt angles range from 21–54°. There are a spread of Zn–Sb bond distances ranging from 2.75–2.86 Å. In the seventh Zn2+ site, Zn2+ is bonded to four Sb3- atoms to form ZnSb4 tetrahedra that share corners with four CaSb6 octahedra, corners with three ZnSb4 tetrahedra, edges with five CaSb6 octahedra, and faces with two equivalent CaSb6 octahedra. The corner-sharing octahedra tilt angles range from 21–53°. There are a spread of Zn–Sb bond distances ranging from 2.74–2.88 Å. In the eighth Zn2+ site, Zn2+ is bonded to four Sb3- atoms to form ZnSb4 tetrahedra that share corners with four CaSb6 octahedra, corners with three ZnSb4 tetrahedra, edges with five CaSb6 octahedra, and faces with two equivalent CaSb6 octahedra. The corner-sharing octahedra tilt angles range from 26–56°. There are a spread of Zn–Sb bond distances ranging from 2.70–2.92 Å. In the ninth Zn2+ site, Zn2+ is bonded in a trigonal planar geometry to three Sb3- atoms. There are one shorter (2.58 Å) and two longer (2.64 Å) Zn–Sb bond lengths. There are eighteen inequivalent Sb3- sites. In the first Sb3- site, Sb3- is bonded in a 9-coordinate geometry to six Ca2+ and three Zn2+ atoms. In the second Sb3- site, Sb3- is bonded in a 7-coordinate geometry to five Ca2+ and two equivalent Zn2+ atoms. In the third Sb3- site, Sb3- is bonded in a 7-coordinate geometry to six Ca2+ and two equivalent Zn2+ atoms. In the fourth Sb3- site, Sb3- is bonded in a 7-coordinate geometry to five Ca2+ and two equivalent Zn2+ atoms. In the fifth Sb3- site, Sb3- is bonded in a 7-coordinate geometry to five Ca2+ and two equivalent Zn2+ atoms. In the sixth Sb3- site, Sb3- is bonded in a 7-coordinate geometry to five Ca2+ and two equivalent Zn2+ atoms. In the seventh Sb3- site, Sb3- is bonded in a 8-coordinate geometry to six Ca2+ and two equivalent Zn2+ atoms. In the eighth Sb3- site, Sb3- is bonded in a 7-coordinate geometry to six Ca2+ and two equivalent Zn2+ atoms. In the ninth Sb3- site, Sb3- is bonded in a 8-coordinate geometry to six Ca2+ and two Zn2+ atoms. In the tenth Sb3- site, Sb3- is bonded in a 8-coordinate geometry to six Ca2+ and two Zn2+ atoms. In the eleventh Sb3- site, Sb3- is bonded in a 8-coordinate geometry to six Ca2+ and two Zn2+ atoms. In the twelfth Sb3- site, Sb3- is bonded in a 8-coordinate geometry to six Ca2+ and two Zn2+ atoms. In the thirteenth Sb3- site, Sb3- is bonded in a 9-coordinate geometry to six Ca2+ and three Zn2+ atoms. In the fourteenth Sb3- site, Sb3- is bonded to six Ca2+ and one Zn2+ atom to form distorted edge-sharing SbCa6Zn pentagonal bipyramids. In the fifteenth Sb3- site, Sb3- is bonded to six Ca2+ and one Zn2+ atom to form a mixture of distorted edge and corner-sharing SbCa6Zn pentagonal bipyramids. In the sixteenth Sb3- site, Sb3- is bonded to six Ca2+ and one Zn2+ atom to form a mixture of distorted edge and corner-sharing SbCa6Zn pentagonal bipyramids. In the seventeenth Sb3- site, Sb3- is bonded in a distorted body-centered cubic geometry to six Ca2+ and two Zn2+ atoms. In the eighteenth Sb3- site, Sb3- is bonded in a distorted body-centered cubic geometry to six Ca2+ and two Zn2+ atoms.