Pyrochlores. XI. High-pressure studies of the antimonates A₂Sb₂O₇ (A = Ca, Sr, Cd) and preparation of the weberite Sr₂Bi₂O₇

1 November 1980

journal article
Published by Canadian Science Publishing in Canadian Journal of Chemistry

Vol. 58 (21) , 2221-2224
https://doi.org/10.1139/v80-357

Abstract

Reactive hot-pressing experiments at 60–70 kbar and 700–900 °C indicate that the relative stability of the pyrochlore and weberite phases of the A₂Sb₂O₇ (A = Ca, Sr, Cd) antimonates depends primarily on the effective size of A²⁺ and the covalency of the A—O bond working in conjunction. The analogous bismuthate(V) Sr₂Bi₂O₇, obtained by hot pressing of SrBiO_3−x with an excess of KClO₃, has been shown to have the weberite-type structure.

Keywords

HIGH PRESSURE

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Pyrochlores. XI. High-pressure studies of the antimonates A2Sb2O7 (A = Ca, Sr, Cd) and preparation of the weberite Sr2Bi2O7

Abstract

Keywords

Pyrochlores. XI. High-pressure studies of the antimonates A₂Sb₂O₇ (A = Ca, Sr, Cd) and preparation of the weberite Sr₂Bi₂O₇