Crystallography. A twinned crystal; esp. a flat, triangular diamond that is a twinned crystal.
| 单词 | θ70602 | 
| 释义 | the world > matter > chemistry > crystallography (general) > crystal (general) > crystal types > 			[noun]		 > composite crystals > twin (9)		 macle1798 Crystallography. A twinned crystal; esp. a flat, triangular diamond that is a twinned crystal. twina1824 Crystallography. A composite crystal consisting of two (usually equal and similar) crystals united in reversed positions with respect to each… Subcategories:— 			types of			(3)		 — 			formation of			(1)		 — 			Neumann bands			(2)		 — 			contactual union between twinned crystals			(1)		 | 
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