Synthesis and Properties of Inorganic Compounds

Russian Journal of Inorganic Chemistry

, Volume 55, Issue 4, pp 484-493

First online:

Synthesis of Ba4R3F17 (R stands for rare-earth elements) powders and transparent compacts on their base

  • S. V. KuznetsovAffiliated withResearch Center for Laser Materials and Technologies, Prokhorov Institute of General Physics, Russian Academy of Sciences Email author 
  • , P. P. FedorovAffiliated withResearch Center for Laser Materials and Technologies, Prokhorov Institute of General Physics, Russian Academy of Sciences
  • , V. V. VoronovAffiliated withResearch Center for Laser Materials and Technologies, Prokhorov Institute of General Physics, Russian Academy of Sciences
  • , K. S. SamarinaAffiliated withResearch Center for Laser Materials and Technologies, Prokhorov Institute of General Physics, Russian Academy of Sciences
  • , R. P. ErmakovAffiliated withResearch Center for Laser Materials and Technologies, Prokhorov Institute of General Physics, Russian Academy of Sciences
  • , V. V. OsikoAffiliated withResearch Center for Laser Materials and Technologies, Prokhorov Institute of General Physics, Russian Academy of Sciences

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Abstract

Single-phase samples of Ba4R3F17 · nH2O (R = La, Ce, Pr, Nd, Eu, Gd, Y, Er, or Yb; n = 2.5−3.2) were prepared by coprecipitation from nitrate solutions using hydrofluoric acid. The phases crystallize in a fluorite-type face-centered cubic lattice. The dried precipitates are transparent. Scanning electron and atomic-force microscopy and X-ray diffraction line broadening show a hierarchic structure in the samples: primary nanoparticles join into agglomerates with characteristic sizes of about 150–200 nm, these agglomerates being self-packed into parallel layers with a thickness on the order of 500 nm.