Formation enthalpy of magnesium, strontium, barium and zinc ortho-vanadates

Standard enthalpy values of the formation of Mg, Sr, Ba, and Zn orthovanadates have been calculated on the basis of calorimetric determining the heats of solution of orthovanadates, oxides, and carbonates of the above metals and of V2O5. The linear dependence has been established between the enthalpy of orthovanadates formation from their oxides and the melting points