Novel Mixing Oxidation State Rare Earth Fluoride KEuCeF6

Abstract

Abstract: Novel mixed oxidation state rare earth fluoride KEuCeF6 was synthesized by reducing tysonite structure type mixed rare earth trifluoride with metallic potassium vapor.The new compound was characterized by chemical analysis. X-ray powder diffraction, XPSand fluorescence spectra.The new compound has a stuffed structure of UCl₃, related to NaNdF₄ and gagarinite.Crystal system:Trigonal;space group: P3 ;Bravais lattice type hPwith lattice parameters a=645.4(2)pm, c=373. 0(1)pm, c/a=0.578. V=134. 65(12)×10⁶pm6, Z=1, D_x=5.49g·cm^-3, Dpyc=5.42g·cm^-3.

Key words: Rare earth, Europium, Fluoride, Crystal structure.Gagarinite

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GUAN Jun, TANG Zhong-Jia, WU Guo-Qing. Novel Mixing Oxidation State Rare Earth Fluoride KEuCeF₆[J]. Chem. J. Chinese Universities, 1994, 15(11): 1592.

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Novel Mixing Oxidation State Rare Earth Fluoride KEuCeF₆

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