The phase equilibria of the systems SrO‐CuO and SrO‐1/2Bi 2 O 3 were studied by X‐ray diffraction analysis of quenched powder samples. The compounds SrCuO 2 and Sr 2 CuO 3 melt incongruently at 1085° and 1225°C, respectively. The newly found compound Sr 6 Bi 2 O 9 decomposes at 965°C into SrO and Sr 3 Bi 2 O 6 melts incongruently into SrO and liquid at 1210°C. SrBi 2 O 4 undergoes a phase transition at ∼825°C, and although both are nonstoichiometric, the low‐temperature phase is slightly poorer in SrO with 33.5 mol% SrO than the high‐temperature phase.
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Hwang et al. (1990) studied this question.
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