…In these aggregates, the orientation of the individual crystals is usually irregular, but sometimes there is a certain geometric regularity in the mutual orientation of two individual crystals; if the orientations of the two crystals are different, this is called a twin. If two crystals are attached parallel to each other, this is called a parallel growth. Both twins and parallel growths often show reentrant angles (depressions). … *Some of the terminology that refers to "parallel growth" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…これらの集合体の中では個々の結晶の方位が不規則であるのが普通であるが,ときには二つの結晶個体の相互の方位にある幾何学的な規則性がある場合があり,それら2個体の方位が互いに異なればこれを双晶という。また,2個体が互いに平行にくっつきあっている場合にはこれを平行連晶parallel growthという。双晶も平行連晶も凹入角(くぼんだところ)を示すことが多い。… ※「parallel growth」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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