GEOL 2540 Lecture Notes - Lecture 7: Crystal Growth, Accorhotels
14 Apr 2016
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Crystal shape resulting from a combination of forms and their perfection (or their absence) habit shape imparted to a crystal by its dominant crystal forms h d l euhedral bh d l subhedral h d l anhedral. The morphology and habit of a crystal depend not only on its crystal structure, but also on the geological conditions in which it forms conditions in which it forms. {001} grows more slowly than {110} slowly than {110} Multistage crystal growth scepter growth p g normal growth. Twinning ( 1) contact tw in m = contact ( tw inning) plane ( 2) penetration tw in. 3 contact plane (031) (031) contact plane ( 3) cyclic tw ins ( 3) cyclic tw ins (110) (110) (110) ( 010) Multiple twins composed of 3 or more parts twinned according to the same law, with non-parallel composition planes mp p p ( 4) polysynthetic tw ins.
