Thallium(III) selenite, Tl2(SeO3)3.
The structure of Tl2(SeO3)3 [dithallium(III) triselenium(IV) nonaoxide] is monoclinic (P21/n symmetry), with all atoms in general positions. It is built up from TlO6 octahedra, distorted TlO7 pentagonal bipyramids and (SeO3)2- pyramids sharing vertices and edges to form corrugated (001) layers. The Se lone pairs of electrons are accommodated in the interlayer regions.
Harrison
William T A
WT
Department of Chemistry, University of Aberdeen, Meston Walk, Aberdeen, AB24 3UE, Scotland.