Twinning by reticular merohedry

From Online Dictionary of Crystallography

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Maclage par mériédrie réticulaire (Fr). Geminazione per meroedria reticolare(It)

Twinning by reticular merohedry

In the presence of a sublattice whose oriented point group D(LT) differs from that of the crystal (individual) lattice D(Lind), a symmetry element belonging to D(LT) but not to D(Lind) 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 polyholohedry can occur.

Related articles

Twin lattice

See also

Chapter 3.3 of International Tables of Crystallography, Volume D