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Title: Materials Data on LaMg2H7 by Materials Project

Abstract

LaMg2H7 crystallizes in the tetragonal P4_12_12 space group. The structure is three-dimensional. Mg2+ is bonded to seven H1- atoms to form distorted MgH7 pentagonal bipyramids that share corners with two equivalent LaH12 cuboctahedra, corners with two equivalent MgH7 pentagonal bipyramids, edges with four equivalent LaH12 cuboctahedra, and edges with four equivalent MgH7 pentagonal bipyramids. There are a spread of Mg–H bond distances ranging from 1.92–2.12 Å. La3+ is bonded to twelve H1- atoms to form distorted LaH12 cuboctahedra that share corners with four equivalent MgH7 pentagonal bipyramids, edges with eight equivalent MgH7 pentagonal bipyramids, and faces with four equivalent LaH12 cuboctahedra. There are a spread of La–H bond distances ranging from 2.38–2.53 Å. There are four inequivalent H1- sites. In the first H1- site, H1- is bonded to four equivalent Mg2+ atoms to form a mixture of edge and corner-sharing HMg4 tetrahedra. In the second H1- site, H1- is bonded in a 1-coordinate geometry to one Mg2+ and two equivalent La3+ atoms. In the third H1- site, H1- is bonded to two equivalent Mg2+ and two equivalent La3+ atoms to form a mixture of edge and corner-sharing HLa2Mg2 tetrahedra. In the fourth H1- site, H1- is bonded in a 4-coordinatemore » geometry to two equivalent Mg2+ and two equivalent La3+ atoms.« less

Authors:
Publication Date:
Other Number(s):
mp-703316
DOE Contract Number:  
AC02-05CH11231; EDCBEE
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). LBNL Materials Project
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Collaborations:
MIT; UC Berkeley; Duke; U Louvain
Subject:
36 MATERIALS SCIENCE
Keywords:
crystal structure; LaMg2H7; H-La-Mg
OSTI Identifier:
1285613
DOI:
https://doi.org/10.17188/1285613

Citation Formats

The Materials Project. Materials Data on LaMg2H7 by Materials Project. United States: N. p., 2020. Web. doi:10.17188/1285613.
The Materials Project. Materials Data on LaMg2H7 by Materials Project. United States. doi:https://doi.org/10.17188/1285613
The Materials Project. 2020. "Materials Data on LaMg2H7 by Materials Project". United States. doi:https://doi.org/10.17188/1285613. https://www.osti.gov/servlets/purl/1285613. Pub date:Sat May 02 00:00:00 EDT 2020
@article{osti_1285613,
title = {Materials Data on LaMg2H7 by Materials Project},
author = {The Materials Project},
abstractNote = {LaMg2H7 crystallizes in the tetragonal P4_12_12 space group. The structure is three-dimensional. Mg2+ is bonded to seven H1- atoms to form distorted MgH7 pentagonal bipyramids that share corners with two equivalent LaH12 cuboctahedra, corners with two equivalent MgH7 pentagonal bipyramids, edges with four equivalent LaH12 cuboctahedra, and edges with four equivalent MgH7 pentagonal bipyramids. There are a spread of Mg–H bond distances ranging from 1.92–2.12 Å. La3+ is bonded to twelve H1- atoms to form distorted LaH12 cuboctahedra that share corners with four equivalent MgH7 pentagonal bipyramids, edges with eight equivalent MgH7 pentagonal bipyramids, and faces with four equivalent LaH12 cuboctahedra. There are a spread of La–H bond distances ranging from 2.38–2.53 Å. There are four inequivalent H1- sites. In the first H1- site, H1- is bonded to four equivalent Mg2+ atoms to form a mixture of edge and corner-sharing HMg4 tetrahedra. In the second H1- site, H1- is bonded in a 1-coordinate geometry to one Mg2+ and two equivalent La3+ atoms. In the third H1- site, H1- is bonded to two equivalent Mg2+ and two equivalent La3+ atoms to form a mixture of edge and corner-sharing HLa2Mg2 tetrahedra. In the fourth H1- site, H1- is bonded in a 4-coordinate geometry to two equivalent Mg2+ and two equivalent La3+ atoms.},
doi = {10.17188/1285613},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {5}
}