Acta Cryst. (2003). E59, i43-i46  [ doi:10.1107/S160053680300374X ]

Bi₃ScMo₂O₁₂: the difference from Bi₃FeMo₂O₁₂

U. Kolitsch and E. Tillmanns

Abstract: Bi₃ScMo₂O₁₂, tribismuth(III) scandium molybdate(VI), has a framework structure derived from that of scheelite. It is nearly isotypic with Bi₃FeMo₂O₁₂; while in the latter the Fe^III atom is tetrahedrally coordinated by O atoms, the Sc atom in the title compound has a distorted octahedral coordination, and is substituted by Bi to a very minor extent (ca 4%). The change in coordination is achieved predominantly by shifts of two O atoms. The average Sc-O and Mo-O bond lengths are 2.162 and 1.775  Å, respectively. The environments of the two eight-coordinated Bi sites are very similar to those in Bi₃FeMo₂O₁₂. All atoms are on general positions except Sc and one Bi (both of which have site symmetry 2).

Online 28 February 2003

Copyright © International Union of Crystallography
IUCr Webmaster