Materials Data on MgAlH4O2F5 by Materials Project
MgAlH4O2F5 crystallizes in the orthorhombic Imma space group. The structure is three-dimensional. Mg2+ is bonded to two equivalent O2- and four equivalent F1- atoms to form MgO2F4 octahedra that share corners with four equivalent AlF6 octahedra. The corner-sharing octahedral tilt angles are 43°. Both Mg–O bond lengths are 2.09 Å. All Mg–F bond lengths are 2.02 Å. Al3+ is bonded to six F1- atoms to form AlF6 octahedra that share corners with two equivalent AlF6 octahedra and corners with four equivalent MgO2F4 octahedra. The corner-sharing octahedra tilt angles range from 29–43°. There is four shorter (1.82 Å) and two longer (1.86 Å) Al–F bond length. 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 water-like geometry to one Mg2+ and two equivalent H1+ atoms. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded in a distorted bent 150 degrees geometry to one Mg2+ and one Al3+ atom. In the second F1- site, F1- is bonded in a bent 150 degrees geometry to two equivalent Al3+ atoms.
- 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:
- 1199935
- Report Number(s):
- mp-24142
- Resource Relation:
- Related Information: https://materialsproject.org/citing
- Country of Publication:
- United States
- Language:
- English
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