Materials Data on YGeBiO5 by Materials Project
YBiGeO5 crystallizes in the orthorhombic Pbca space group. The structure is three-dimensional. Y3+ is bonded to seven O2- atoms to form distorted YO7 pentagonal bipyramids that share corners with five equivalent GeO4 tetrahedra and edges with three equivalent YO7 pentagonal bipyramids. There are a spread of Y–O bond distances ranging from 2.32–2.42 Å. Ge4+ is bonded to four O2- atoms to form GeO4 tetrahedra that share corners with five equivalent YO7 pentagonal bipyramids. There are a spread of Ge–O bond distances ranging from 1.76–1.80 Å. Bi3+ is bonded in a distorted pentagonal planar geometry to five O2- atoms. There are a spread of Bi–O bond distances ranging from 2.18–2.35 Å. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Y3+ and one Ge4+ atom. In the second O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Y3+ and one Ge4+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to one Y3+, one Ge4+, and one Bi3+ atom. In the fourth O2- site, O2- is bonded to two equivalent Y3+ and two equivalent Bi3+ atoms to form edge-sharing OY2Bi2 tetrahedra. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to one Ge4+ and two equivalent Bi3+ atoms.