Le diagramme des phases solides du systeme Bi2O3single bondCaO

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The phase diagram Bi2O3single bondCaO has been investigated in the solid state by high temperature X-ray analysis and D.T.A. methods. Four compounds (Bi14Ca 5O26, Bi2CaO4, Bi10Ca 7O22, and Bi6Ca 7O16), which melt incongruently, and four solid solutions (fcc, bcc, and two rhombohedral) have been characterized. Quenchings of the fcc solid solution lead to several metastable fluorite-type ss. These, as well as the quenched forms of the rhombohedral and bcc solid solutions, have defect oxygen lattice consistent with the formula Bi(2−2n)Ca (2n−1)O(2−n)n.

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