The synthetic cobalt vanadium selenite, Co₂V₂Se₂O₁₁.
The crystal structure of dicobalt(II) divanadium(V) disel-enium(IV) undeca-oxide, Co₂V₂Se₂O₁₁, exhibits a three-dimensional framework, the building units being distorted CoO₆ octa-hedra 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 Se(IV)) tetra-hedra reside and connect to the other building blocks. The structure contains corner- and edge-sharing CoO₆ octa-hedra, corner- and edge-sharing VO₅ square pyramids and edge-sharing Ψ-SeO₃E tetra-hedra. Co₂V₂Se₂O₁₁ is the first oxide containing all the cations Co(II), V(V) and Se(IV).
Department of Materials and Environmental Chemistry, Stockholm University, SE-106 91 Stockholm,  Sweden.
Faiz
F
Rabbani
Iwan
I
Zimmermann
Mats
M
Johnsson