Thermochimica Acta, Vol.288, No.1-2, 53-61, 1996
Enthalpies of Formation from the Component Oxides of Mgwo4, Cawo4 (Scheelite), Srwo4, and Bawo4, Determined by High-Temperature Direct Synthesis Calorimetry
The enthalpies of formation, from the constituent oxides, of tungstates of alkaline earth metals, MeWO(4)(Me is Mg, Ca, Sr, Ba), have been determined by direct synthesis calorimetry at 1473 +/- 2 K. The following values of Delta H-f at 298 K (kJ mol(-1)) are reported : MgWO4, -73.9 +/- 4.8; CaWO4 (scheelite), -168.5 +/- 3.3; SrWO4, -2179 +/- 3.6; BaWO4, -256.2 +/- 3.9. The results are compared with data available in the literature.