Two caesium vanadium hydrogenphosphates with tunnelled structures: Cs2V2O3(PO4)(HPO4) and Cs2[(VO)3(HPO4)4(H2O)].H2O

Romain Gautier (1) , Jean-François Colin (1) , Eric Le Fur (1)

1 ISCR - Institut des Sciences Chimiques de Rennes

Dicaesium divanadium trioxide phosphate hydrogenphosphate, Cs2V2O3(PO4)(HPO4), (I), and dicaesium tris[oxidovanadate(IV)] hydrogenphosphate dihydrate, Cs2[(VO)3-(HPO4)4(H2O)] H2O, (II), crystallize in the monoclinic system with all atoms in general positions. The structures of the two compounds are built up from VO6 octahedra and PO4 tetrahedra. In (I), infinite chains of corner-sharing VO6 octahedra are connected to V2O10 dimers by phosphate and hydrogenphosphate groups, while in (II) three vanadium octahedra share vertices leading to V3O15(H2O) trimers separated by hydrogenphosphate groups. Both structures show three-dimensional frameworks with tunnels in which Cs+ cations are located.

Domaines: Matériaux

Romain Gautier, Jean-François Colin, Eric Le Fur. Two caesium vanadium hydrogenphosphates with tunnelled structures: Cs2V2O3(PO4)(HPO4) and Cs2[(VO)3(HPO4)4(H2O)].H2O. Acta Crystallographica Section C : Crystal Structure Communications [1968-2013], 2010, C66, pp.i12. ⟨10.1107/S010827010905433X⟩. ⟨hal-00831623⟩