Twin index
From Online Dictionary of Crystallography
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Revision as of 05:35, 26 April 2006 by AndreAuthier (talk | contribs)
Indice de macle (Fr). Indice di geminazione (It)
Twin index
A twinning operation overlaps both the direct and reciprocal lattices of the individuals that form a twin; consequently, the nodes of the individual lattices are overlapped (restored) to some extent (twinning (effects of)). The reciprocal n of the fraction 1/n of (quasi)restored nodes is called twin index
Chapter 3.3 of International Tables of Crystallography, Volume D