Materials Data on Ge3Sb2O9 by Materials Project

Ge3Sb2O9 crystallizes in the hexagonal P6_3/m space group. The structure is two-dimensional and consists of two Ge3Sb2O9 sheets oriented in the (0, 0, 1) direction. Ge4+ is bonded to four O2- atoms to form corner-sharing GeO4 tetrahedra. There are a spread of Ge–O bond distances ranging from 1.76–1.78 Å. Sb3+ is bonded in a distorted T-shaped geometry to three equivalent O2- atoms. All Sb–O bond lengths are 2.02 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Ge4+ and one Sb3+ atom. In the second O2- site, O2- is bonded in a bent 120 degrees geometry to two equivalent Ge4+ atoms.