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A TEM and powder XRD study of new fluorite and perovskite-related phases in the CaO-ZrO2-Ta2O5 system

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1996-11-15

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Abstract

A new long period, anion-deficient, fluorite-related super-structure phase (a = 36.372(3), b = 7.3590(5), and c = 31.018(8) Å) has been discovered in the CaO-ZrO2-Ta2O5 system at an experimentally determined composition of 0.304(4)TaO2.5• 0.347(4)ZrO2•0.349(4)/CaO. Electron diffraction suggests a space group symmetry for this phase of Fddd. It is furthermore shown that substantial amounts of Ta2O5 can be incorporated into CaZrO3 without apparently altering structure type. Extremely sluggish kinetics, however, make it difficult to determine the extent of this perovskite-related solid solution.

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https://dspace-test.anu.edu.au/handle/1885/733738598

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DevOps Pure Testing

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Journal of Solid State Chemistry

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Article

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DOI

10.1006/jssc.1996.0359

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