Materials Data on Gd2Be2GeO7 by Materials Project
Be2Gd2GeO7 crystallizes in the monoclinic Cm space group. The structure is three-dimensional. there are three inequivalent Be2+ sites. In the first Be2+ site, Be2+ is bonded to four O2- atoms to form BeO4 tetrahedra that share a cornercorner with one BeO4 tetrahedra and corners with two equivalent GeO4 tetrahedra. There are a spread of Be–O bond distances ranging from 1.58–1.71 Å. In the second Be2+ site, Be2+ is bonded to four O2- atoms to form BeO4 tetrahedra that share a cornercorner with one BeO4 tetrahedra and corners with two equivalent GeO4 tetrahedra. There are a spread of Be–O bond distances ranging from 1.58–1.71 Å. In the third Be2+ site, Be2+ is bonded to four O2- atoms to form BeO4 tetrahedra that share a cornercorner with one BeO4 tetrahedra and corners with two equivalent GeO4 tetrahedra. There are a spread of Be–O bond distances ranging from 1.58–1.71 Å. There are three inequivalent Gd3+ sites. In the first Gd3+ site, Gd3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Gd–O bond distances ranging from 2.31–2.63 Å. In the second Gd3+ site, Gd3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Gd–O bond distances ranging from 2.30–2.63 Å. In the third Gd3+ site, Gd3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Gd–O bond distances ranging from 2.31–2.63 Å. Ge4+ is bonded to four O2- atoms to form GeO4 tetrahedra that share corners with four BeO4 tetrahedra. All Ge–O bond lengths are 1.76 Å. There are nine inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to one Be2+ and three Gd3+ atoms. In the second O2- site, O2- is bonded in a 2-coordinate geometry to one Be2+, two Gd3+, and one Ge4+ atom. In the third O2- site, O2- is bonded in a 2-coordinate geometry to one Be2+, two Gd3+, and one Ge4+ atom. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to one Be2+ and three Gd3+ atoms. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to one Be2+, two Gd3+, and one Ge4+ atom. In the sixth O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Be2+ and two Gd3+ atoms. In the seventh O2- site, O2- is bonded in a 4-coordinate geometry to two Be2+ and two equivalent Gd3+ atoms. In the eighth O2- site, O2- is bonded in a 1-coordinate geometry to one Be2+ and three Gd3+ atoms. In the ninth O2- site, O2- is bonded in a 2-coordinate geometry to one Be2+, two Gd3+, and one Ge4+ atom.