Materials Data on Mn3Al2(GeO4)3 by Materials Project

Abstract

Mn3Al2Ge3O12 crystallizes in the cubic Ia-3d space group. The structure is three-dimensional. Mn2+ is bonded in a distorted body-centered cubic geometry to eight equivalent O2- atoms. There are four shorter (2.29 Å) and four longer (2.47 Å) Mn–O bond lengths. Al3+ is bonded to six equivalent O2- atoms to form AlO6 octahedra that share corners with six equivalent GeO4 tetrahedra. All Al–O bond lengths are 1.92 Å. Ge4+ is bonded to four equivalent O2- atoms to form GeO4 tetrahedra that share corners with four equivalent AlO6 octahedra. The corner-sharing octahedral tilt angles are 49°. All Ge–O bond lengths are 1.78 Å. O2- is bonded in a 4-coordinate geometry to two equivalent Mn2+, one Al3+, and one Ge4+ atom.