Materials Data on Ca3Lu2(GeO4)3 by Materials Project

Abstract

Ca3Lu2(GeO4)3 crystallizes in the cubic Ia-3d space group. The structure is three-dimensional. Ca2+ is bonded in a distorted body-centered cubic geometry to eight equivalent O2- atoms. There are four shorter (2.46 Å) and four longer (2.61 Å) Ca–O bond lengths. Lu3+ is bonded to six equivalent O2- atoms to form LuO6 octahedra that share corners with six equivalent GeO4 tetrahedra. All Lu–O bond lengths are 2.19 Å. Ge4+ is bonded to four equivalent O2- atoms to form GeO4 tetrahedra that share corners with four equivalent LuO6 octahedra. The corner-sharing octahedral tilt angles are 51°. All Ge–O bond lengths are 1.79 Å. O2- is bonded in a 4-coordinate geometry to two equivalent Ca2+, one Lu3+, and one Ge4+ atom.