Materials Data on Sr3Sc2(GeO4)3 by Materials Project

Abstract

Sr3Sc2Ge3O12 crystallizes in the cubic Ia-3d space group. The structure is three-dimensional. Sr2+ is bonded in a distorted body-centered cubic geometry to eight equivalent O2- atoms. There are four shorter (2.53 Å) and four longer (2.70 Å) Sr–O bond lengths. Sc3+ is bonded to six equivalent O2- atoms to form ScO6 octahedra that share corners with six equivalent GeO4 tetrahedra. All Sc–O bond lengths are 2.13 Å. Ge4+ is bonded to four equivalent O2- atoms to form GeO4 tetrahedra that share corners with four equivalent ScO6 octahedra. The corner-sharing octahedral tilt angles are 46°. All Ge–O bond lengths are 1.79 Å. O2- is bonded in a 4-coordinate geometry to two equivalent Sr2+, one Sc3+, and one Ge4+ atom.