Category:Twinning

Twin"ning, n. (crystallog.)

Defn: the assemblage of two or more crystals, or parts of crystals, In reversed position with reference to each other in accordance with Some definite law; also, rarely, in artificial twinning (accomplished For example by pressure), the process by which this reversal is Brought about. Polysynthetic twinning, repeated twinning of crystal Lamellæ, as that of the triclinic feldspars. -- repeated twinning, twinning of more than two crystals, or parts Of crystals. -- twinning axis, twinning plane. See the note under twin, n.