Flux synthesis of cubic potassium antimonate

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Abstract

Although the compound KSbO3has 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, B2O3or other oxides of small cations a primitive cubic phase was found with a{reversed tilde equals}9.578A. 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<x≤0.5) is now under investigation. © 1974.

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Brower, W. S., Minor, D. B., Parker, H. S., Roth, R. S., & Waring, J. L. (1974). Flux synthesis of cubic potassium antimonate. Materials Research Bulletin, 9(8), 1045–1051. https://doi.org/10.1016/0025-5408(74)90015-4

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