Materials Data on Be2GeO4 by Materials Project
Be2GeO4 crystallizes in the trigonal R-3 space group. The structure is three-dimensional. there are two inequivalent Be2+ sites. In the first Be2+ site, Be2+ is bonded to four O2- atoms to form BeO4 tetrahedra that share corners with four BeO4 tetrahedra and corners with four equivalent GeO4 tetrahedra. There are a spread of Be–O bond distances ranging from 1.64–1.66 Å. In the second Be2+ site, Be2+ is bonded to four O2- atoms to form BeO4 tetrahedra that share corners with four BeO4 tetrahedra and corners with four equivalent GeO4 tetrahedra. There are a spread of Be–O bond distances ranging from 1.64–1.67 Å. Ge4+ is bonded to four O2- atoms to form GeO4 tetrahedra that share corners with eight BeO4 tetrahedra. There is two shorter (1.77 Å) and two longer (1.78 Å) Ge–O bond length. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a trigonal planar geometry to two equivalent Be2+ and one Ge4+ atom. In the second O2- site, O2- is bonded in a trigonal planar geometry to two Be2+ and one Ge4+ atom. In the third O2- site, O2- is bonded in a trigonal planar geometry to two equivalent Be2+ and one Ge4+ atom. In the fourth O2- site, O2- is bonded in a trigonal planar geometry to two Be2+ and one Ge4+ atom.