Title: Materials Data on Rb2Ti(GeO3)3 by Materials Project

Abstract

Rb2Ti(GeO3)3 crystallizes in the trigonal P-3c1 space group. The structure is three-dimensional. Rb1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Rb–O bond distances ranging from 2.71–3.38 Å. There are two inequivalent Ti4+ sites. In the first Ti4+ site, Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with six equivalent GeO4 tetrahedra. There is three shorter (1.96 Å) and three longer (2.02 Å) Ti–O bond length. In the second Ti4+ site, Ti4+ is bonded to six equivalent O2- atoms to form TiO6 octahedra that share corners with six equivalent GeO4 tetrahedra. All Ti–O bond lengths are 1.98 Å. There are two inequivalent Ge4+ sites. In the first Ge4+ site, Ge4+ is bonded to four O2- atoms to form GeO4 tetrahedra that share corners with two equivalent TiO6 octahedra and corners with two GeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 29–38°. There are a spread of Ge–O bond distances ranging from 1.75–1.79 Å. In the second Ge4+ site, Ge4+ is bonded to four O2- atoms to form GeO4 tetrahedra that share corners with two equivalent TiO6 octahedra and corners with two equivalent GeO4 tetrahedra. The corner-sharingmore » octahedral tilt angles are 39°. There is two shorter (1.73 Å) and two longer (1.83 Å) Ge–O bond length. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted linear geometry to two equivalent Rb1+ and two equivalent Ge4+ atoms. In the second O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Rb1+ and two Ge4+ atoms. In the third O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Rb1+, one Ti4+, and one Ge4+ atom. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Rb1+, one Ti4+, and one Ge4+ atom. In the fifth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two equivalent Rb1+, one Ti4+, and one Ge4+ atom.« less

Authors:

The Materials Project

Publication Date:

Wed Apr 29 00:00:00 EDT 2020

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)

Contributing Org.:

MIT; UC Berkeley; Duke; U Louvain

OSTI Identifier:

1283523

Report Number(s):

mp-680154

DOE Contract Number:  

AC02-05CH11231; EDCBEE

Resource Type:

Data

Resource Relation:

Related Information: https://materialsproject.org/citing

Country of Publication:

United States

Language:

English

Subject:

36 MATERIALS SCIENCE; crystal structure; Rb2Ti(GeO3)3; Ge-O-Rb-Ti