Structural relationships among bismuth-rich phases in the Bi2O3-Nb2O5, Bi2O3-Ta2O5, Bi2O3-MoO3 and Bi2O3-WO3 systems
The crystal structures of bismuth-rich phases in the Bi2O3-M2O5 (M = Nb, Ta) and Bi2O3-M2O6 (M = W, Mo) systems are investigated, and the most probable model for the crystal structure of each phase is used to propose a crystal-chemical scheme unifying key features of these structures in terms of their relationships to a fluorite-type δ-Bi2O3-related parent structure. This scheme is based on the incorporation of pyrochlore-type structural motifs (e.g., strings of M atoms along 〈110〉F directions)...[Show more]
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|Source:||Journal of Solid State Chemistry|
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