On structure of hydrated phosphates and arsenates of V (5)

Crystalline compounds with laminated type of structure of VOPO4xnH2O and VOAsO4xnH2O are studied. The interaction between [VOXOsub(4)]sub(infinity)sup(2) layers has an electrostatical character in the above compounds and products of their dehydration. In hydrates interaction goes through the H2O molecule with one of layers H-bonds, and in anhydrous products - at the expense of V=0...V=0 groups of opposite layers. V(5) letragonal pyramids and phosphate and arsenate tetrahedrons, formed, are the main elements of the structure