Flux synthesis of cubic potassium antimonate |
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Authors: | W.S. Brower D.B. Minor H.S. Parker R.S. Roth J.L. Waring |
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Affiliation: | National Bureau of Standards Washington, D.C. 20234 USA |
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Abstract: | Although the compound KSbO3 has been reported to occur in a high temperature cubic polymorph, only the rhombohedral ilmenite phase was obtained in this study for pure material at ambient pressure and temperatures up to about 1350°C in open Pt crucibles or sealed Pt tubes. With the addition of about 2 mole percent SiO2, B2O3 or other oxides of small cations a primitive cubic phase was found with . Small single crystals of a body centered cubic phase (a=9.605A) were easily synthesized by a flux evaporation technique at about 1000°C in an open Pt crucible from a composition of about 5 mole % Sb2O4:95 mole % KF. The exact composition and structure of this phase (presumably K1?xSbO3?xFx, 0
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