Coprecipitation from aqueous solutions to prepare binary fluorides

  • P. P. Fedorov
  • S. V. Kuznetsov
  • M. N. Mayakova
  • V. V. Voronov
  • R. P. Ermakov
  • A. E. Baranchikov
  • V. V. Osiko
Synthesis and Properties of Inorganic Compounds


The synthesis of binary fluoride phases, specifically nanofluorides, by coprecipitation from aqueous solutions is considered in terms of phase equilibria. Phases have been precipitated in NaF-RF3 systems (where R stands for a rare-earth element), MF2-YF3 systems (where M = Ca, Sr, Ba), BaF2-ScF3, and CaF2-BaF2 systems. In the MF2-YF3 systems, unordered metastable congruently soluble phases are precipitated instead of ordered fluorite-like phases. In the BaF2-ScF3 system, the congruently soluble compound Ba3Sc2F12 is precipitated. In the NaF-RF3 systems, incongruently soluble metastable phases with a fluorite-like structure (for R = Er, Lu, Y) and the gagarinite structure (NaGdF4) are formed. In the CaF2-BaF2 system, intermediate phases have not been formed.


Scan Ning Electron Microscopy Fluorite Phase Scan Ning Electron Microscopy Image Barium Fluoride Yttrium Fluoride 
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Copyright information

© Pleiades Publishing, Ltd. 2011

Authors and Affiliations

  • P. P. Fedorov
    • 1
  • S. V. Kuznetsov
    • 1
  • M. N. Mayakova
    • 1
  • V. V. Voronov
    • 1
  • R. P. Ermakov
    • 1
  • A. E. Baranchikov
    • 2
  • V. V. Osiko
    • 1
  1. 1.Prokhorov General Physics InstituteRussian Academy of SciencesMoscowRussia
  2. 2.Kurnakov Institute of General and Inorganic ChemistryRussian Academy of SciencesMoscowRussia

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