Twinning by inversion
From Online Dictionary of Crystallography
Revision as of 05:36, 14 February 2006 by AndreAuthier
The symmetry operation relating pairs of domain structures twinned by inversion may be represented by inversion through a point or by some other isometry equivalent to inversion under the point symmetry group of the domain structure. A two-domain-structure twin that is twinned by inversion is called an inversion twin, but this term is not appropriate when there are more than two domain structures.
Section 3.3 of International Tables of Crystallography, Volume D