Materials Data on Gd2Sn2O7 by Materials Project
Gd2Sn2O7 crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Gd3+ is bonded in a body-centered cubic geometry to eight O2- atoms. There are two shorter (2.29 Å) and six longer (2.55 Å) Gd–O bond lengths. Sn4+ is bonded to six equivalent O2- atoms to form corner-sharing SnO6 octahedra. The corner-sharing octahedral tilt angles are 52°. All Sn–O bond lengths are 2.09 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to four equivalent Gd3+ atoms to form OGd4 tetrahedra that share corners with sixteen OGd4 tetrahedra and edges with six equivalent OGd2Sn2 tetrahedra. In the second O2- site, O2- is bonded to two equivalent Gd3+ and two equivalent Sn4+ atoms to form a mixture of distorted corner and edge-sharing OGd2Sn2 tetrahedra.