The new phosphates Ca9MLn2/3(PO4)7(M= Li, Na; Ln = rare earth, Y, Bi)

  • Lazoryak B
  • Strunenkova T
  • Vovk E
 et al. 
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Abstract

The new family of triple phosphates Ca9MLn2/3(PO4)7(Ln = rare earth, Y, Bi; M = Li+, Na+) has been synthesized and studied by X-ray powder diffraction, IR-spectroscopy, differential thermal analyses and luminescence. All compounds have the whitlockite-like structure (space group R3c). Cell parameters, IR and emission (Eu3+) spectra are given. The luminescence properties of trivalent europium are analyzed in Ca9NaEu2/3(PO4)7and Ca9LiEu2/3(PO4)7at 290 K. The fluorescence lifetime of the4F3/2-4I11/2transition of Nd3+is reported for the solid solutions Ca9NdxGd1-x(PO4)7, Ca3-xNd2x/3(PO4)2and Ca9M(NdxGd1-x)2/3(PO4)7(M = Li, Na).

Author-supplied keywords

  • A. Inorganic compounds
  • B. Chemical synthesis
  • C. Infrared spectroscopy
  • C. X-ray diffraction
  • D. Luminescence

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Authors

  • B. I. Lazoryak

  • T. V. Strunenkova

  • E. A. Vovk

  • V. V. Mikhailin

  • I. N. Shpinkov

  • A. Yu Romanenko

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