The synthetic cobalt vanadium selenite, Co2V2Se2O11

Abstract

The crystal structure of dicobalt(II) divanadium(V) diselenium(IV) undecaoxide, Co2V2Se2O11, exhibits a three-dimensional framework, the building units being distorted CoO6 octahedra and VO5 square pyramids arranged so as to form alternate chains along [010]. The framework has channels along [100] and [010] in which the two Ψ-SeO3E (site symmetries m; E being the 4s2 lone electron pair of SeIV) tetrahedra reside and connect to the other building blocks. The structure contains corner- and edge-sharing CoO6 octahedra, corner- and edge-sharing VO5 square pyramids and edge-sharing Ψ-SeO3E tetrahedra. Co2V2Se2O11 is the first oxide containing all the cations CoII, VV and SeIV.