Materials Data on K4Ba(SiO3)3 by Materials Project
K4BaSi3O9 crystallizes in the orthorhombic Ama2 space group. The structure is three-dimensional. there are four inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 8-coordinate geometry to ten O2- atoms. There are a spread of K–O bond distances ranging from 2.67–3.39 Å. In the second K1+ site, K1+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of K–O bond distances ranging from 2.70–3.05 Å. In the third K1+ site, K1+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of K–O bond distances ranging from 2.91–3.27 Å. In the fourth K1+ site, K1+ is bonded to six O2- atoms to form KO6 octahedra that share corners with six SiO4 tetrahedra. There are a spread of K–O bond distances ranging from 2.65–2.81 Å. Ba2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Ba–O bond distances ranging from 2.66–3.04 Å. There are two inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with two equivalent KO6 octahedra and corners with two equivalent SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 22–52°. There are a spread of Si–O bond distances ranging from 1.61–1.69 Å. In the second Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with two equivalent KO6 octahedra and corners with two SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 35–38°. There is two shorter (1.62 Å) and two longer (1.70 Å) Si–O bond length. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to four K1+ and one Si4+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to four K1+, one Ba2+, and one Si4+ atom. In the third O2- site, O2- is bonded in a distorted linear geometry to three K1+, one Ba2+, and two Si4+ atoms. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to three K1+, one Ba2+, and one Si4+ atom. In the fifth O2- site, O2- is bonded in a distorted linear geometry to four K1+ and two equivalent Si4+ atoms. In the sixth O2- site, O2- is bonded in a 1-coordinate geometry to four K1+, one Ba2+, and one Si4+ atom.
- 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:
- 1315177
- Report Number(s):
- mp-976307
- Resource Relation:
- Related Information: https://materialsproject.org/citing
- Country of Publication:
- United States
- Language:
- English
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