Materials Data on Ge3PbO7 by Materials Project
PbGe3O7 crystallizes in the orthorhombic Pbca space group. The structure is three-dimensional. Pb2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Pb–O bond distances ranging from 2.41–3.03 Å. There are three inequivalent Ge4+ sites. In the first Ge4+ site, Ge4+ is bonded to four O2- atoms to form GeO4 tetrahedra that share corners with two equivalent GeO4 tetrahedra and a cornercorner with one GeO5 trigonal bipyramid. There are a spread of Ge–O bond distances ranging from 1.74–1.81 Å. In the second Ge4+ site, Ge4+ is bonded to four O2- atoms to form GeO4 tetrahedra that share corners with two equivalent GeO4 tetrahedra and corners with two equivalent GeO5 trigonal bipyramids. There are a spread of Ge–O bond distances ranging from 1.74–1.79 Å. In the third Ge4+ site, Ge4+ is bonded to five O2- atoms to form GeO5 trigonal bipyramids that share corners with three GeO4 tetrahedra and corners with two equivalent GeO5 trigonal bipyramids. There are a spread of Ge–O bond distances ranging from 1.79–2.04 Å. There are seven inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to one Pb2+ and two Ge4+ atoms. In the second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Pb2+ and two Ge4+ atoms. In the third O2- site, O2- is bonded in a bent 120 degrees geometry to one Pb2+ and two Ge4+ atoms. In the fourth O2- site, O2- is bonded in a bent 120 degrees geometry to two Ge4+ atoms. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Pb2+ and two equivalent Ge4+ atoms. In the sixth O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent Pb2+ and one Ge4+ atom. In the seventh O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two Ge4+ atoms.