U.S. Department of EnergyOffice of Scientific and Technical Information
Materials Data on K2Sr(Ge4O9)2 by Materials Project
Abstract
K2Sr(Ge4O9)2 crystallizes in the trigonal P-3c1 space group. The structure is three-dimensional. K1+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of K–O bond distances ranging from 2.70–2.90 Å. Sr2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Sr–O bond distances ranging from 2.72–3.12 Å. There are seven inequivalent Ge4+ sites. In the first Ge4+ site, Ge4+ is bonded to six equivalent O2- atoms to form corner-sharing GeO6 octahedra. All Ge–O bond lengths are 1.93 Å. In the second Ge4+ site, Ge4+ is bonded to four O2- atoms to form GeO4 tetrahedra that share corners with two GeO6 octahedra and corners with two GeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 49–55°. There are a spread of Ge–O bond distances ranging from 1.74–1.81 Å. In the third Ge4+ site, Ge4+ is bonded to six O2- atoms to form corner-sharing GeO6 octahedra. There is three shorter (1.90 Å) and three longer (1.91 Å) Ge–O bond length. In the fourth Ge4+ site, Ge4+ is bonded to four O2- atoms to form GeO4 tetrahedra that share corners with two GeO6 octahedra and corners with two GeO4 tetrahedra. The corner-sharingmore »
- Authors:
- Publication Date:
- Other Number(s):
- mp-1212505
- 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; K2Sr(Ge4O9)2; Ge-K-O-Sr
- OSTI Identifier:
- 1728317
- DOI:
- https://doi.org/10.17188/1728317
Citation Formats
The Materials Project. Materials Data on K2Sr(Ge4O9)2 by Materials Project. United States: N. p., 2019.
Web. doi:10.17188/1728317.
The Materials Project. Materials Data on K2Sr(Ge4O9)2 by Materials Project. United States. doi:https://doi.org/10.17188/1728317
The Materials Project. 2019.
"Materials Data on K2Sr(Ge4O9)2 by Materials Project". United States. doi:https://doi.org/10.17188/1728317. https://www.osti.gov/servlets/purl/1728317. Pub date:Sat Jan 12 00:00:00 EST 2019
@article{osti_1728317,
title = {Materials Data on K2Sr(Ge4O9)2 by Materials Project},
author = {The Materials Project},
abstractNote = {K2Sr(Ge4O9)2 crystallizes in the trigonal P-3c1 space group. The structure is three-dimensional. K1+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of K–O bond distances ranging from 2.70–2.90 Å. Sr2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Sr–O bond distances ranging from 2.72–3.12 Å. There are seven inequivalent Ge4+ sites. In the first Ge4+ site, Ge4+ is bonded to six equivalent O2- atoms to form corner-sharing GeO6 octahedra. All Ge–O bond lengths are 1.93 Å. In the second Ge4+ site, Ge4+ is bonded to four O2- atoms to form GeO4 tetrahedra that share corners with two GeO6 octahedra and corners with two GeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 49–55°. There are a spread of Ge–O bond distances ranging from 1.74–1.81 Å. In the third Ge4+ site, Ge4+ is bonded to six O2- atoms to form corner-sharing GeO6 octahedra. There is three shorter (1.90 Å) and three longer (1.91 Å) Ge–O bond length. In the fourth Ge4+ site, Ge4+ is bonded to four O2- atoms to form GeO4 tetrahedra that share corners with two GeO6 octahedra and corners with two GeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 50–63°. There are a spread of Ge–O bond distances ranging from 1.75–1.80 Å. In the fifth Ge4+ site, Ge4+ is bonded to six O2- atoms to form corner-sharing GeO6 octahedra. There is three shorter (1.89 Å) and three longer (1.92 Å) Ge–O bond length. In the sixth Ge4+ site, Ge4+ is bonded to six equivalent O2- atoms to form corner-sharing GeO6 octahedra. All Ge–O bond lengths are 1.94 Å. In the seventh Ge4+ site, Ge4+ is bonded to four O2- atoms to form GeO4 tetrahedra that share corners with two GeO6 octahedra and corners with two GeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 57–63°. There are a spread of Ge–O bond distances ranging from 1.76–1.83 Å. There are nine inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to one K1+ and two Ge4+ atoms. In the second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Sr2+ and two Ge4+ atoms. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to one Sr2+ and two Ge4+ atoms. In the fourth O2- site, O2- is bonded in a distorted trigonal planar geometry to one K1+ and two Ge4+ atoms. In the fifth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Sr2+ and two Ge4+ atoms. In the sixth O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent K1+ and two Ge4+ atoms. In the seventh O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Sr2+ and two Ge4+ atoms. In the eighth O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent K1+ and two Ge4+ atoms. In the ninth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one K1+, one Sr2+, and two Ge4+ atoms.},
doi = {10.17188/1728317},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Jan 12 00:00:00 EST 2019},
month = {Sat Jan 12 00:00:00 EST 2019}
}