Structural features and spectroscopic and energy characteristics of alkali metal molybdates and tungstates

The results of X-ray structural, IR and Raman spectroscopic, and thermodynamic studies of alkali metal molybdates and tungstates A₂M_nO_3n+1 (A = Li, Na, K, Rb, Cs; M = Mo, W) are reviewed and analysed. The dependence of the vibrational spectra, activation energies, and crystal lattice energies on features of the structures of these compounds is discussed. The bibliography includes 51 references.