SCHEDULED MAINTENANCE
Crystal structure of Bi2W2O9, the n=2 member of the homologous series (Bi2O2)BVInO3n+1 of cation-deficient Aurivillius phases
Abstract
The crystal structure of Bi
2
W
2
O
9
has been solved by single crystal X-ray diffraction data analysis and refined to R=0.046 for 991 independent reflections. Bi
2
W
2
O
9
crystallizes with orthorhombic symmetry, Pna2
1
space group, Z=4, a=5.440(1), b=5.413(1), c=23.740(5) Å. The model previously proposed by Watanabe et al., i.e. Bi
2
O
2
layers interleaved with ReO
3
-like slabs of W
2
O
7
, has been confirmed. The distortion of the W
2
O
7
octahedral network has been analysed and compared to that observed in homologous Aurivillius phases.
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