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Symmetry constraints and modularity:tools to model inorganic crystal structures.
Six single crystals of Mg (Mg Si Al )Si O with x = 0.05, 0.13, 0.24, 0.38, 0.52, and 0.64 (the 3 x x 2(R)Cx 3 12 majorite solid-solution) were synthesized at 20 GPa and 2000 ?C with a °∞6-8°± type ...
AnewKAlSiO polymorphwasfoundinagranulitefaciesgneissfromthePunalur district,southernIndia.Thestructurewassolvedandre?nedonatwinnedcrystaltoan R indexvalueof1.98%for265independentre?ections.Metamorph...
From the symmetry point of view, micas may be classified as follows: those with all three octahedrally coordinated sites occupied by the same cation (homo-octahedral micas), those with only two of the...
The idealized symmetry of kaolinite-type minerals (1:1 phyllosilicates) is analysed in detail. They can be considered as OD-structures consisting of three kinds of OD-layers. Each of them, taken separ...

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