Materials Data on Be2SiO4 by Materials Project
Be2SiO4 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 SiO4 tetrahedra. There are a spread of Be–O bond distances ranging from 1.64–1.67 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 SiO4 tetrahedra. There is three shorter (1.65 Å) and one longer (1.67 Å) Be–O bond length. Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with eight BeO4 tetrahedra. All Si–O bond lengths are 1.65 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a trigonal planar geometry to two Be2+ and one Si4+ atom. In the second O2- site, O2- is bonded in a trigonal planar geometry to two equivalent Be2+ and one Si4+ atom. In the third O2- site, O2- is bonded in a trigonal planar geometry to two equivalent Be2+ and one Si4+ atom. In the fourth O2- site, O2- is bonded in a trigonal planar geometry to two Be2+ and one Si4+ atom.