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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Rb6Ge2O7 by Materials Project

Rb6Ge2O7 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are three inequivalent Rb1+ sites. In the first Rb1+ site, Rb1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Rb–O bond distances ranging from 2.93–3.12 Å. In the second Rb1+ site, Rb1+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Rb–O bond distances ranging from 2.92–3.11 Å. In the third Rb1+ site, Rb1+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Rb–O bond distances ranging from 2.81–3.13 Å. Ge4+ is bonded to four O2- atoms to form corner-sharing GeO4 tetrahedra. There are a spread of Ge–O bond distances ranging from 1.77–1.85 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to five Rb1+ and one Ge4+ atom. In the second O2- site, O2- is bonded in a distorted linear geometry to four Rb1+ and two equivalent Ge4+ atoms. In the third O2- site, O2- is bonded in a 1-coordinate geometry to five Rb1+ and one Ge4+ atom. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to four Rb1+ and one Ge4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Rb4GeO4 by Materials Project

Rb4GeO4 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are four inequivalent Rb1+ sites. In the first Rb1+ site, Rb1+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Rb–O bond distances ranging from 2.84–3.09 Å. In the second Rb1+ site, Rb1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Rb–O bond distances ranging from 2.83–3.45 Å. In the third Rb1+ site, Rb1+ is bonded to four O2- atoms to form distorted RbO4 tetrahedra that share corners with four equivalent GeO4 tetrahedra and an edgeedge with one RbO4 tetrahedra. There are a spread of Rb–O bond distances ranging from 2.76–2.84 Å. In the fourth Rb1+ site, Rb1+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Rb–O bond distances ranging from 2.77–3.33 Å. Ge4+ is bonded to four O2- atoms to form GeO4 tetrahedra that share corners with four equivalent RbO4 tetrahedra. There is two shorter (1.80 Å) and two longer (1.81 Å) Ge–O bond length. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to five Rb1+ and one Ge4+ atom. In the second O2- site, O2- is bonded in a 1-coordinate geometry to five Rb1+ and one Ge4+ atom. In the third O2- site, O2- is bonded in a 6-coordinate geometry to five Rb1+ and one Ge4+ atom. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to five Rb1+ and one Ge4+ atom.

36 MATERIALS SCIENCE↗