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Figure 3
The constructed structure with the space-group symmetry P[\bar 4]. Small squares indicate CoO4 tetrahedra, and triangles and pentagons denote tetrahedra of Si and Ca—O polyhedra, respectively. The shaded pentagons correspond to the sixfold coordinated Ca—O polyhedra. The unit cell of the commensurate structure is indicated with the large square.

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
Volume 57| Part 3| May 2001| Pages 271-277
doi:10.1107/S010876810100101X
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