Standard enthalpy characteristics of alkali and alkaline-earth metals vanadates

According to the model equations the enthalpy characteristics of alkali and alkaline-earth metals meta- and orthovanadates have been calculated (crystal lattice enthalpy, interparticle interaction enthalpy). Predictive calculations of standard formation enthalpies (SFE) of cesium, francium and radium vanadates have been carried out. SFE of vanadate ion ΔfH° (VO3-,g) = 648,613±0,267 kJ/mol has been determined with the use of thermal and structural characteristics of 12 vanadates.