Cu3V10O28.24H2O and CuNa4V10O28.23H2O.
The crystal structures of tricopper decavanadate tetracosahydrate, (I), and copper tetrasodium decavanadate tricosahydrate, (II), have been determined by single-crystal X-ray diffraction. Both compounds exhibit a catenary structure consisting of [V10O28](6-) anions linked by Cu2+ cations in (I) or by Na+ cations in (II). Compound (II) also contains a polymeric linear array of edge-sharing [Na(OH2)6](+) and [Cu(OH2)6](2+) octahedra. In both compounds, the [V10O28](6-) ions lie about inversion centres and the Cu2+ ions in (I) also lie about inversion centers.
Iida
Akifumi
A
Department of Chemistry and Materials Science, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8551, Japan.
Ozeki
Tomoji
T