crystal class


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crystal class

n
(Chemistry) crystallog any of 32 possible types of crystals, classified according to their rotational symmetry about axes through a point. Also called: point group
References in periodicals archive ?
Then I would sit under the shade of a willow tree, sipping from a crystal class while rereading Paul Auster.
A practiced eye can easily recognize that the new faces do not match the ones possible for the crystal class of scheelite, and a close examination with a handmagnifier clearly reveals the signs of filing and polishing.