Acta Cryst. (2007). E63, i1-i2  [ doi:10.1107/S1600536806051737 ]

LiTb(PO₃)₄

E. Ben Zarkouna, K. Horchani-Naifer, M. Férid and A. Driss

Abstract: The lithium terbium polyphosphate LiTb(PO₃)₄ was prepared by the flux method using a large excess of H₃PO₄. It was structurally characterized by single-crystal X-ray diffraction and found to be isotypic with LiYb(PO₃)₄. The basic structural units are endless spiral chains, (PO₃)_n, along the b-axis direction. The Li⁺ and Tb³⁺ cations alternate on twofold axes and are four- and eight-coordinated, respectively. The results of an optical study of this material are also given and discussed.

Online 6 December 2006

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