Characteristic features of the crystal chemistry of lanthanide molybdates and tungstates

The review gives a systematic account and analyses the characteristic features of the chemical composition, crystal structures, and properties of lanthanide molybdates and tungstates. The structure forming role of molybdenum(VI), tungsten(VI), and the lanthanides(III) in oxide compounds is discussed within the framework of the bond valence force model and ideas concerning non-bonding intercationic interactions. The theoretical conclusions, as regards the correspondence between the compositions, structures, and properties of the compounds are compared with experimental data. 136 references.