Acta Cryst. (2003). E59, i10-i13  [ doi:10.1107/S1600536803000990 ]

NaAl(MoO₄)₂: a rare structure type among layered yavapaiite-related AM(XO₄)₂ compounds

U. Kolitsch, M. Maczka and J. Hanuza

Abstract: NaAl(MoO₄)₂, sodium aluminium dimolybdate(VI), represents a rare pseudo-orthorhombic structure type among AM(XO₄)₂ compounds with yavapaiite-related sheet structures. It is isostructural with NaFe(MoO₄)₂. Infinite (001) sheets composed of AlO₆ octahedra, corner-linked to MoO₄ tetrahedra, are separated by eight-coordinated Na atoms. Average Na-O, Al-O and Mo-O bond lengths are 2.648, 1.890, and 1.762  Å, respectively. All atoms are on general positions except for Na and Al (both of which have site symmetry ).

Online 17 January 2003

Copyright © International Union of Crystallography
IUCr Webmaster