Materials Data on BeSi(AgO2)2 by Materials Project

Abstract

Ag2BeSiO4 crystallizes in the orthorhombic Pca2_1 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 SiO4 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 SiO4 tetrahedra. There are a spread of Be–O bond distances ranging from 1.64–1.67 Å. There are four inequivalent Ag1+ sites. In the first Ag1+ site, Ag1+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Ag–O bond distances ranging from 2.48–2.66 Å. In the second Ag1+ site, Ag1+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Ag–O bond distances ranging from 2.40–2.72 Å. In the third Ag1+ site, Ag1+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Ag–O bond distances ranging from 2.48–2.65 Å. In the fourth Ag1+ site, Ag1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Ag–O bond distances ranging from 2.40–2.94 Å. There are two inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with four BeO4 tetrahedra. There is three shorter (1.65 Å) and one longer (1.66 Å) Si–O bond length. In the second Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with four BeO4 tetrahedra. There is two shorter (1.65 Å) and two longer (1.66 Å) Si–O bond length. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to one Be2+, two Ag1+, and one Si4+ atom. In the second O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Be2+, two Ag1+, and one Si4+ atom. In the third O2- site, O2- is bonded in a 2-coordinate geometry to one Be2+, three Ag1+, and one Si4+ atom. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to one Be2+, two Ag1+, and one Si4+ atom. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to one Be2+, three Ag1+, and one Si4+ atom. In the sixth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Be2+, two Ag1+, and one Si4+ atom. In the seventh O2- site, O2- is bonded in a 2-coordinate geometry to one Be2+, two Ag1+, and one Si4+ atom. In the eighth O2- site, O2- is bonded in a 2-coordinate geometry to one Be2+, three Ag1+, and one Si4+ atom.