| 单词 | penetration twinning |
| 释义 | > as lemmaspenetration twinning penetration twinning n. ΚΠ 1935 Philos. Trans. (Royal Soc.) A. 235 128 The product was always in clusters of prisms joined to each other at various angles, often by penetration twinning. 1953 F. H. Pough Field Guide Rocks & Minerals i. iv. 53 We also find attractive penetration twinning in phenakite. 1995 Mineral. Mag. 59 3 The morphology shown in Fig. 2a is typical of anorthite megacrysts from island arcs, and penetration twinning is commonly observed. < as lemmas |
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