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Analysis of high-resolution synchrotron X-ray powder diffraction patterns of hydrothermally synthesized Rb2CdSi5O12 and Cs2MnSi5O12 leucite analogues and dry-synthesized Cs2CoSi5O12 and Cs2NiSi5O12 leucite analogues showed that they have an orthorhombic Pbca structure. The structures have been refined by the Rietveld method showing that the tetrahedrally coordinated atoms (Si, Cd, Mn, Co and Ni) are ordered onto separate sites. The Cs2MnSi5O12, Cs2CoSi5O12 and Cs2NiSi5O12 leucite samples are unusual in having SiO4 tetrahedra more distorted, on average, than the larger MnO4, CoO4 and NiO4 tetrahedra. The JCPDS file numbers for Rb2CdSi5O12, Cs2MnSi5O12, Cs2CoSi5O12 and Cs2NiSi5O12 are 46-1491, 46-1492, 46-1493, respectively.

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cif

Crystallographic Information File (CIF)
Contains datablocks global, Rb2CdSi5O12, Cs2MnSi5O12, Cs2CoSi5O12, Cs2NiSi5O12

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