单词 plagioclase 释义 plagioclase Min.|pledkles|[Named 1847, f. plagio- + Gr. ά fracture, cleavage.](See quot. 1868.)1868Dana Min. (ed. 5) Suppl. 802 Plagioclase, Breithaupt's name for the group of triclinic feldspars, the two prominent cleavage directi...