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Figure 11
Disordered module intergrowth (polysynthetic twinning) in nominal N = 4 Ca8Pb12(Si2O7)6Cl4 was observed in ≃ 5% of crystal fragments. (a) [100]* SAEDs from areas containing α, β module disorder are characterized by the presence of dynamical forbidden (00l) reflections with l ≠ 2n and pronounced streaking. (b) Low magnification images show modulated contrast indicative of disorder. (c) HRTEM can be interpreted as mainly N = 4 and N = 3 polysomes with intercalation of N = 5 or 7 recognized less frequently.

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
Volume 66| Part 1| February 2010| Pages 1-16
https://doi.org/10.1107/S0108768109053981
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