View source for Twinning by reticular merohedry

<font color="blue">Maclage par mériédrie réticulaire</font> (''Fr'').  <font color="red">Verzwillingung durch reticulare Meroedrie</font> (''Ge''). <font color="black">Geminazione per meroedria reticolare</font> (''It''). <font color="green">Macla por meroedría reticular</font> (''Sp'').


= [[Twinning]] by reticular merohedry =

In the presence of a sublattice whose oriented [[point group]] ''D''('''L'''<sub>''T''</sub>) differs from that of the crystal (individual) lattice ''D''('''L'''<sub>''ind''</sub>), a symmetry element belonging to ''D''('''L'''<sub>''T''</sub>) but not to ''D''('''L'''<sub>''ind''</sub>) can act as [[twin element]]. 

If lattice and sublattice have the same point group but (some of) their symmetry elements are differently oriented, ''[[twinning by reticular polyholohedry]]'' can occur.

==See also==
*[[Twin lattice]]
*Chapter 3.3 of ''International Tables for Crystallography, Volume D''

[[Category:Twinning]]