Materials Data on Ca2ZnAs2(H2O5)2 by Materials Project
Ca2ZnAs2(H2O5)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Ca2+ is bonded to seven O2- atoms to form distorted CaO7 pentagonal bipyramids that share corners with two equivalent CaO7 pentagonal bipyramids, corners with four equivalent AsO4 tetrahedra, edges with two equivalent ZnO6 octahedra, an edgeedge with one CaO7 pentagonal bipyramid, and an edgeedge with one AsO4 tetrahedra. There are a spread of Ca–O bond distances ranging from 2.40–2.54 Å. Zn2+ is bonded to six O2- atoms to form ZnO6 octahedra that share corners with four equivalent AsO4 tetrahedra and edges with four equivalent CaO7 pentagonal bipyramids. There are a spread of Zn–O bond distances ranging from 2.07–2.28 Å. As5+ is bonded to four O2- atoms to form AsO4 tetrahedra that share corners with two equivalent ZnO6 octahedra, corners with four equivalent CaO7 pentagonal bipyramids, and an edgeedge with one CaO7 pentagonal bipyramid. The corner-sharing octahedra tilt angles range from 49–57°. There are a spread of As–O bond distances ranging from 1.70–1.74 Å. There are two inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to two O2- atoms. There is one shorter (1.00 Å) and one longer (1.78 Å) H–O bond length. In the second H1+ site, H1+ is bonded in a distorted bent 150 degrees geometry to two O2- atoms. There is one shorter (1.02 Å) and one longer (1.55 Å) H–O bond length. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one Ca2+, one Zn2+, and one As5+ atom. In the second O2- site, O2- is bonded in a distorted water-like geometry to one Ca2+, one Zn2+, and two H1+ atoms. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to one Ca2+, one As5+, and one H1+ atom. In the fourth O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Ca2+, one As5+, and one H1+ atom. In the fifth O2- site, O2- is bonded to two equivalent Ca2+, one Zn2+, and one As5+ atom to form a mixture of distorted edge and corner-sharing OCa2ZnAs tetrahedra.
- 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:
- 1733895
- Report Number(s):
- mp-1214196
- Resource Relation:
- Related Information: https://materialsproject.org/citing
- Country of Publication:
- United States
- Language:
- English
Similar Records
Materials Data on Ca4As3H9O16 by Materials Project
Materials Data on Ca3(AsO4)2 by Materials Project