Materials Data on SrCu(SeO3)2 by Materials Project
SrCu(SeO3)2 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. Sr2+ is bonded to eight O2- atoms to form distorted corner-sharing SrO8 hexagonal bipyramids. There are a spread of Sr–O bond distances ranging from 2.61–2.82 Å. Cu2+ is bonded in a square co-planar geometry to four O2- atoms. There is two shorter (1.95 Å) and two longer (1.98 Å) Cu–O bond length. Se4+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. There are a spread of Se–O bond distances ranging from 1.70–1.77 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to one Sr2+, one Cu2+, and one Se4+ atom. In the second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Sr2+, one Cu2+, and one Se4+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Sr2+ and one Se4+ atom.