Title of article :
The new phosphates Ca9MLn23(PO4)7 (M = Li, Na; Ln = rare earth, Y, Bi)
Author/Authors :
Lazoryak، نويسنده , , B.I. and Strunenkova، نويسنده , , T.V. and Vovk، نويسنده , , E.A. and Mikhailin، نويسنده , , V.V. and Shpinkov، نويسنده , , I.N. and Romanenko، نويسنده , , A.Yu. and Schekoldin، نويسنده , , V.N.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 1996
Abstract :
The new family of triple phosphates Ca9MLn23(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 Ca9NaEu23(PO4)7 and Ca9LiEu23(PO4)7 at 290 K. The fluorescence lifetime of the 4F32 − 4I112 transition of Nd3+ is reported for the solid solutions Ca9NdxGd1 − x(PO4)7, Ca3 − xNd2x3(PO4)2 and Ca9M(NdxGd1 − x)23(PO4)7 (M = Li, Na).
Keywords :
A. Inorganic compounds , B. Chemical synthesis , D. Luminescence , C. Infrared spectroscopy , C. X-ray diffraction
Journal title :
Materials Research Bulletin
Journal title :
Materials Research Bulletin
