10.17188/1206564
None Available
Materials Data on Tm2Sn2O7 by Materials Project
LBNL Materials Project; Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
2020
Specialized Mix
36 MATERIALS SCIENCE
crystal structure
Tm2Sn2O7
O-Sn-Tm
The Materials Project
2020
en
Tm2Sn2O7 crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Tm3+ is bonded in a body-centered cubic geometry to eight O2- atoms. There are two shorter (2.26 Å) and six longer (2.47 Å) Tm–O bond lengths. Sn4+ is bonded to six equivalent O2- atoms to form corner-sharing SnO6 octahedra. The corner-sharing octahedral tilt angles are 55°. All Sn–O bond lengths are 2.07 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to four equivalent Tm3+ atoms to form OTm4 tetrahedra that share corners with sixteen OTm4 tetrahedra and edges with six equivalent OTm2Sn2 tetrahedra. In the second O2- site, O2- is bonded to two equivalent Tm3+ and two equivalent Sn4+ atoms to form a mixture of distorted edge and corner-sharing OTm2Sn2 tetrahedra.