Difference between revisions of "Twinning (effects of)"

From Online Dictionary of Crystallography

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<Font color="black"> Geminazione (effetti della)</Font>(''It'')
<Font color="black"> Geminazione (effetti della) </Font>(''It'')

Revision as of 15:40, 21 April 2006

Geminazione (effetti della) (It)

Overlap of lattices

By effect of a twinning operation, both the direct and reciprocal lattice of the individuals forming a twin are overlapped. Overlapping (restoration) of nodes belonging to different individuals can be: (i) exact and total (twinning by merohedry); (ii) exact but partial (i.e. only a fraction of the nodes of an individual lattice is restored; twinning by reticular merohedry); (iii) total but approximate (twinning by pseudomerohedry), approximate and partial (twinning by reticular pseudomerohedry). Related to the overlap of lattices twin lattice, twin index and twin obliquity are defined.