Materials Data on Na4Al3Ge3BrO12 by Materials Project

Abstract

Na4Al3Ge3O12Br crystallizes in the cubic P-43n space group. The structure is three-dimensional. Na1+ is bonded to three equivalent O2- and one Br1- atom to form NaBrO3 tetrahedra that share corners with three equivalent NaBrO3 tetrahedra, corners with three equivalent AlO4 tetrahedra, and corners with three equivalent GeO4 tetrahedra. All Na–O bond lengths are 2.35 Å. The Na–Br bond length is 2.89 Å. Al3+ is bonded to four equivalent O2- atoms to form AlO4 tetrahedra that share corners with four equivalent NaBrO3 tetrahedra and corners with four equivalent GeO4 tetrahedra. All Al–O bond lengths are 1.77 Å. Ge4+ is bonded to four equivalent O2- atoms to form GeO4 tetrahedra that share corners with four equivalent NaBrO3 tetrahedra and corners with four equivalent AlO4 tetrahedra. All Ge–O bond lengths are 1.76 Å. O2- is bonded in a distorted trigonal planar geometry to one Na1+, one Al3+, and one Ge4+ atom. Br1- is bonded in a tetrahedral geometry to four equivalent Na1+ atoms.