Materials Data on NdGeBO5 by Materials Project
NdBGeO5 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Nd3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Nd–O bond distances ranging from 2.36–2.61 Å. B3+ is bonded to four O2- atoms to form BO4 tetrahedra that share corners with three equivalent GeO4 tetrahedra. There are a spread of B–O bond distances ranging from 1.41–1.60 Å. Ge4+ is bonded to four O2- atoms to form GeO4 tetrahedra that share corners with three equivalent BO4 tetrahedra. There are a spread of Ge–O bond distances ranging from 1.73–1.81 Å. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Nd3+ and one B3+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to one Nd3+, one B3+, and one Ge4+ atom. In the third O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Nd3+, one B3+, and one Ge4+ atom. In the fourth O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Nd3+ and one Ge4+ atom. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to one Nd3+, one B3+, and one Ge4+ atom.