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Figure 5
(a) A portion of the modulated structure of natural fresnoite projected along [100]. Triangles, squares and circles indicate Si tetrahedra, Ti pyramids and Ba cations, respectively. (b) Layer A and (c) layer B in a portion of the modulated structure of natural fresnoite projected along the c axis (see text). The deformed pentagonal rings hosting the Ba atoms having eight- and nine-coordinations are highlighted with a white circle. The octagonal arrangements of the deformed pentagons are indicated.

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
Volume 62| Part 6| November 2006| Pages 1031-1037
doi:10.1107/S0108768106030059
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