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2005
Structure
D 2000
08- 010
Cation and Anion Disorder in New Cubic Rare Earth Carbonates Na2LiLn(CO3)3
(Ln: Eu—Er, Yb, Lu, Y); Synthesis, Crystal Structures, IR, Raman and NMR
Characterizations. — The title compounds are prepared hydrothermally from mixtures of LnF3, Na2CO3, Li2CO 3, and H2O (autoclave, 230 °C, 48 h). They crystallize in
the cubic space group Fd3m with Z = 16 as revealed by single crystal XRD on
Na2LiYb(CO3)3. The structures are built up from LiO6 octahedra, LiO4 tetrahedra and
[(Na2/3 Ln1/3)O8] polyhedra. The compounds are further characterized by NMR, IR, and
Raman spectroscopy. In spite of the evidenced cation and anion disorders, crystals of
Na2LiEu(CO3)3 exhibit no significant conductivity. — (ALI, A. B.; MAISONNEUVE,
V.; HOULBERT, S.; SILLY, G.; BUZARE, J. Y.; LEBLANC*, M.; Solid State Sci. 6
(2004) 11, 1237-1243; Lab. Oxides Fluorures, Univ. Du Maine, CNRS, F-72085 Le
Mans, Fr.; Eng.) — W. Pewestorf
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