Twinning by reticular polyholohedry
From Online Dictionary of Crystallography
Maclage par polyholoédrie réticulaire (Fr). Verzwillingung durch reticulare Polyholoedrie (Ge). Geminazione per polioloedria reticolare (It). Macla por poliholoedría reticular (Sp).
Twinning by reticular polyholohedry is a special case of twinning by reticular merohedry that occurs when the twin lattice has the same point group as the lattice of the individual but at least one of its symmetry elements is differently oriented in space.