Polymorphism of the bivalent metal vanadates MeV2O6 (Me = Mg, Ca, Mn, Co, Ni, Cu, Zn, Cd)

A diagram of phase equilibria established in a two-component oxide system V2
 5–ZnO has been worked out applying differential thermal analysis and X-ray phase analysis as well as depending on investigations carried out with the aid of high-temperature X-ray attachment and scanning electron microscope linked to an X-ray microanalyser.

Reinvestigation of Phase Equilibria in the V2O5–ZnO System

A study of the MgOV2O5 system

Crystal structure and microwave dielectric properties of new alkaline earth vanadate A4V2O9 (A = Ba, Sr, Ca, Mg and Zn) ceramics for LTCC applications

Defect structures in the brannerite-type vanadates. I. Preparation and study of MN1−xфxV2−2xMo2xO6 (0 ≤ x ≤ 0.45)

Vanadate formation during reactions of V2O5 with CoO, NiO, ZnO, MgO and MnO has been studied. The initial products of solid-solid reaction with ZnO, MgO and MnO are Zn2V2O7, Mg3V4O13 and MnV2O6 respectively. CoO and NiO predominantly form the vanadate which corresponds to the stoichiometry of the initial oxide mixture. Subsequent formation of ortho-, pyro- and metavanadates as intermediates indicate that the principal mechanistic process is the transport of V2O5 to the reaction interface.

A. N. Pick

Papers

Dta study of the reactions of V2O5 with metal (II) oxides