Chemical Engineering Division thermochemical studies annual report, July 1975--June 1976. [MgUO/sub 4/; CaUO/sub 4/; BaUO/sub 4/; beta-LiAl]

Standard enthalpies of formation at 298.15 K, ..delta..H/sup 0//sub f/(298 K), are reported for MgUO/sub 4/, CaUO/sub 4/, BaUO/sub 4/, VF/sub 3/, and PrF/sub 3/ based on solution and fluorine bomb calorimetric measurements. High-temperature enthalpy increments have been determined for MgUO/sub 4/ by drop calorimetry. Preliminary work on ..gamma..-UO/sub 3/ and ..beta..-LiAl is described.