Materials Data on Pr2Sn2O7 by Materials Project
Pr2Sn2O7 crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Pr3+ is bonded in a distorted body-centered cubic geometry to eight O2- atoms. There are two shorter (2.33 Å) and six longer (2.62 Å) Pr–O bond lengths. Sn4+ is bonded to six equivalent O2- atoms to form corner-sharing SnO6 octahedra. The corner-sharing octahedral tilt angles are 50°. All Sn–O bond lengths are 2.10 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to four equivalent Pr3+ atoms to form OPr4 tetrahedra that share corners with sixteen OPr4 tetrahedra and edges with six equivalent OPr2Sn2 tetrahedra. In the second O2- site, O2- is bonded to two equivalent Pr3+ and two equivalent Sn4+ atoms to form a mixture of distorted corner and edge-sharing OPr2Sn2 tetrahedra.