Materials Data on Nb2Cd2O7 by Materials Project

Abstract

Cd2Nb2O7 crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Nb5+ is bonded in a body-centered cubic geometry to eight O2- atoms. There are six shorter (2.13 Å) and two longer (2.22 Å) Nb–O bond lengths. Cd2+ is bonded in a distorted hexagonal planar geometry to six equivalent O2- atoms. All Cd–O bond lengths are 2.33 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to two equivalent Nb5+ and two equivalent Cd2+ atoms to form a mixture of distorted edge and corner-sharing ONb2Cd2 tetrahedra. In the second O2- site, O2- is bonded to four equivalent Nb5+ atoms to form a mixture of edge and corner-sharing ONb4 tetrahedra.