OptionallawThe specific Twin Law (e.g., "Albite Law") defining the orientation.
OptionalmodeThe specific mode of formation for the twin (e.g., growth, mechanical).
OptionaloperationThe symmetry operation (reflection, rotation) that relates the twin individuals.
OptionaltypeThe categorization of the twinning mechanism (e.g., contact, penetration).
Descriptive fields for twinning phenomena in crystals.