Abstract
Pyrochlore Bi2Pb2O7 was fabricated under low-temperature hydrothermal conditions and characterized by XRD, IR, SEM DTA–TG, and XPS. XRD analysis shows that the structure of Bi2Pb2O7 is cubic, which is similar to that obtained from high-pressure reactions. XPS measurements suggest that the valences of Bi and Pb ions are +3 and +4, respectively. The cubic Bi2Pb2O7 is a metastable phase; it decomposes into a new phase with liberation of O2 at 450°C.
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