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- W2022187705 abstract "Abstract Nonstoichiometric calcium monouranate, CaUO3.50, was prepared by reducing CaUO4 in a hydrogen stream at 900°C. CaUO3.64 and CaUO3.81 were prepared by heating mixture of CaUO3.50 and CaUO4 in evacuated quartz tubes at 900°C for 50 h. Nonstoichiometric strontium monouranates with compositions SrUO3.62, SrUO3.70, and SrUO3.87 were prepared by heating mixture of SrUO3.52 and α-SrUO4 in evacuated tubes at 300°C for 100h. Chemical analyses were carried out for the products. These are all rhombohedral (R 3 m). The lattice c-parameter decreases at a much larger rate than the a-parameter with increasing oxygen amount, but there exist two-phase regions at CaUO3.81 and SrUO3.87. The effect of heating conditions for these phases was examined. The enthalpies of formation of these compositions were measured. The variation of these data as a function of nonstoichiometry is discussed." @default.
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- W2022187705 date "1984-02-01" @default.
- W2022187705 modified "2023-09-24" @default.
- W2022187705 title "Oxygen nonstoichiometry in calcium and strontium uranates (CaUO4-x and SrUO4-x: Lattice parameters and enthalpies of formation+" @default.
- W2022187705 doi "https://doi.org/10.1016/s0020-1693(00)94589-4" @default.
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