(IUCr) Crystallography Journals Online

Acta Cryst. (2008). E64, i33 [ doi:10.1107/S1600536808013032 ]

Lutetium ultraphosphate

K. Horchani-Naifer and M. Férid

Abstract: The structure of the title compound, LuP₅O₁₄, comprises puckered eight-membered PO₄ rings linked by the lutetium cations in a complex way, forming a three-dimensional framework. Each eight-membered phosphate ring shares a bridging tetrahedron with each of four adjacent tetrahedra, to form layers of PO₄ tetrahedra. These layers are c/2 in thickness and parallel to the ab plane. Each Lu ion is contained in one such layer, forming bonds to six O atoms in that layer and also to one O atom belonging to a tetrahedron in each of the layers lying above and below it. The LuO₈ polyhedra are isolated from one another, since they share no common atoms. The Lu ions lie on twofold axes (special position 4e) and the shortest LuLu distance is 5.703 (1) Å.

Online 10 May 2008