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Title: Materials Data on Sr2MgGe2O7 by Materials Project

Abstract

Sr2MgGe2O7 crystallizes in the tetragonal P-42_1m space group. The structure is three-dimensional. Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.59–2.91 Å. Mg2+ is bonded to four equivalent O2- atoms to form MgO4 tetrahedra that share corners with four equivalent GeO4 tetrahedra. All Mg–O bond lengths are 1.96 Å. Ge4+ is bonded to four O2- atoms to form GeO4 tetrahedra that share a cornercorner with one GeO4 tetrahedra and corners with two equivalent MgO4 tetrahedra. There are a spread of Ge–O bond distances ranging from 1.74–1.82 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded to two equivalent Sr2+ and two equivalent Ge4+ atoms to form a mixture of distorted edge and corner-sharing OSr2Ge2 tetrahedra. In the second O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Sr2+, one Mg2+, and one Ge4+ atom. In the third O2- site, O2- is bonded to three equivalent Sr2+ and one Ge4+ atom to form a mixture of distorted edge and corner-sharing OSr3Ge tetrahedra.

Authors:
Publication Date:
Other Number(s):
mp-972387
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; Sr2MgGe2O7; Ge-Mg-O-Sr
OSTI Identifier:
1313821
DOI:
https://doi.org/10.17188/1313821

Citation Formats

The Materials Project. Materials Data on Sr2MgGe2O7 by Materials Project. United States: N. p., 2020. Web. doi:10.17188/1313821.
The Materials Project. Materials Data on Sr2MgGe2O7 by Materials Project. United States. doi:https://doi.org/10.17188/1313821
The Materials Project. 2020. "Materials Data on Sr2MgGe2O7 by Materials Project". United States. doi:https://doi.org/10.17188/1313821. https://www.osti.gov/servlets/purl/1313821. Pub date:Tue Jul 14 00:00:00 EDT 2020
@article{osti_1313821,
title = {Materials Data on Sr2MgGe2O7 by Materials Project},
author = {The Materials Project},
abstractNote = {Sr2MgGe2O7 crystallizes in the tetragonal P-42_1m space group. The structure is three-dimensional. Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.59–2.91 Å. Mg2+ is bonded to four equivalent O2- atoms to form MgO4 tetrahedra that share corners with four equivalent GeO4 tetrahedra. All Mg–O bond lengths are 1.96 Å. Ge4+ is bonded to four O2- atoms to form GeO4 tetrahedra that share a cornercorner with one GeO4 tetrahedra and corners with two equivalent MgO4 tetrahedra. There are a spread of Ge–O bond distances ranging from 1.74–1.82 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded to two equivalent Sr2+ and two equivalent Ge4+ atoms to form a mixture of distorted edge and corner-sharing OSr2Ge2 tetrahedra. In the second O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Sr2+, one Mg2+, and one Ge4+ atom. In the third O2- site, O2- is bonded to three equivalent Sr2+ and one Ge4+ atom to form a mixture of distorted edge and corner-sharing OSr3Ge tetrahedra.},
doi = {10.17188/1313821},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {7}
}