Acta Cryst. (1999). B55, 306-312 [doi:10.1107/S0108768198014086]
Abstract: The (isomorphous) structures of Bi14WO24, tetradecabismuth tungsten tetracosaoxide, and Bi14MoO24, tetradecabismuth molybdenum tetracosaoxide, have been solved and refined using neutron powder diffraction data in the space group I4/m. The metal-atom array is fully ordered in terms of composition, and in terms of atomic positions deviates only slightly from a fluorite-type ![[bold delta]](/logos/entities/delta_bdgif.gif)
-Bi2O3-related parent structure. Three independent O-atom sites (accounting for 70 out of 78 O atoms in the unit cell) are also very close to fluorite-type parent positions. The remaining two O-atom sites, which coordinate W, exhibit partial occupancies and displacive disorder, neither of which could be better modelled by lowering of symmetry. The W site is coordinated by four O atoms in highly distorted tetrahedral coordination, the tetrahedron necessarily being orientationally disordered on that site. Nonetheless, the structure appears to be chemically reasonable.
Online 1 June 1999
 |   Rietveld powder data file (CIF format) (129.9 kbytes) |
| Rietveld powder data file (CIF format) (978.2 kbytes) |
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