Flux synthesis of cubic potassium antimonate

  • Brower W
  • Minor D
  • Parker H
 et al. 
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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

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  • W. S. Brower

  • D. B. Minor

  • H. S. Parker

  • R. S. Roth

  • J. L. Waring

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