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Figure 6
Polyhedral drawings shown in [100] (left) and [001] (right) of (a) N = 2 Pb10(Si/SO4)6Cl2 − x(OH)x mattheddleite-(Pb Si/S Cl)-2H, (b) N = 3 Ca5.44Mn0.56Pb9(Si2O7)3(SiO4)3□3 ganomalite-(Pb Si □)-3H and (c) N = 4 Ca8Pb12(Si2O7)6Cl4 nasonite-(Ca/Pb Si Cl)-4H with associated twist angles of the individual modules. The AFO6 twist angles across (αα) boundaries are always smaller than (αβ) boundaries.

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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