Collection of Czechoslovak Chemical Communications - digital archive 

Abstract

Ag₃[PO₄, VO₄] mixed crystals were prepared in the whole concentration region. For 0-40 mol % vanadate, the mixed crystals are isostructural with the low-temperature modification of Ag₃PO₄ (T_d⁴, Z = 2); the site group and factor group analysis was performed for this space group. Mixed crystals containing 60% vanadate and more are tetragonal with the structure of Ag₃VO₄. From the analysis of the infrared spectra it follows that in the cubic mixed crystal with 40 mol % Ag₃VO₄, the site symmetry T is additionally lowered to the effective site symmetry C₃ due to the effect of the lattice vibrations of the types T(F) and R(F).