Materials Data on Ca3(GeAs2)2 by Materials Project
Ca3(GeAs2)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are three inequivalent Ca2+ sites. In the first Ca2+ site, Ca2+ is bonded to six As3- atoms to form a mixture of edge and corner-sharing CaAs6 octahedra. The corner-sharing octahedra tilt angles range from 1–6°. There are a spread of Ca–As bond distances ranging from 3.01–3.19 Å. In the second Ca2+ site, Ca2+ is bonded to six As3- atoms to form a mixture of edge and corner-sharing CaAs6 octahedra. The corner-sharing octahedra tilt angles range from 1–7°. There are a spread of Ca–As bond distances ranging from 3.02–3.12 Å. In the third Ca2+ site, Ca2+ is bonded to six As3- atoms to form a mixture of edge and corner-sharing CaAs6 octahedra. The corner-sharing octahedra tilt angles range from 4–7°. There are a spread of Ca–As bond distances ranging from 2.99–3.11 Å. There are two inequivalent Ge3+ sites. In the first Ge3+ site, Ge3+ is bonded in a trigonal non-coplanar geometry to three As3- atoms. There are a spread of Ge–As bond distances ranging from 2.48–2.50 Å. In the second Ge3+ site, Ge3+ is bonded in a trigonal non-coplanar geometry to three As3- atoms. There are a spread of Ge–As bond distances ranging from 2.44–2.51 Å. There are four inequivalent As3- sites. In the first As3- site, As3- is bonded to five Ca2+ and one Ge3+ atom to form a mixture of edge and corner-sharing AsCa5Ge octahedra. The corner-sharing octahedra tilt angles range from 2–89°. In the second As3- site, As3- is bonded to four Ca2+ and two equivalent Ge3+ atoms to form a mixture of edge and corner-sharing AsCa4Ge2 octahedra. The corner-sharing octahedra tilt angles range from 4–89°. In the third As3- site, As3- is bonded to four Ca2+ and two Ge3+ atoms to form a mixture of edge and corner-sharing AsCa4Ge2 octahedra. The corner-sharing octahedra tilt angles range from 4–91°. In the fourth As3- site, As3- is bonded to five Ca2+ and one Ge3+ atom to form AsCa5Ge octahedra that share corners with seven AsCa4Ge2 octahedra and edges with ten AsCa5Ge octahedra. The corner-sharing octahedra tilt angles range from 2–85°.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). LBNL Materials Project
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Contributing Organization:
- MIT; UC Berkeley; Duke; U Louvain
- DOE Contract Number:
- AC02-05CH11231; EDCBEE
- OSTI ID:
- 1193139
- Report Number(s):
- mp-18504
- Resource Relation:
- Related Information: https://materialsproject.org/citing
- Country of Publication:
- United States
- Language:
- English
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