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polymorphism

polymorphism, of minerals, property of crystallizing in two or more distinct forms. Calcium carbonate is dimorphous (two forms), crystallizing as calcite or aragonite. Titanium dioxide is trimorphous; its three forms are brookite, anatase (or octahedrite), and rutile. Polymorphism of an element is called allotropy. The process was discovered (1821) by Eilhard Mitscherlich. See isomorphism; mineral; crystal.

The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2007, Columbia University Press. All rights reserved.

More on polymorphism from Infoplease:

polymorph: meaning and definitions - polymorph: Definition and Pronunciation
polymorphous: meaning and definitions - polymorphous: Definition and Pronunciation
polymorphism: meaning and definitions - polymorphism: Definition and Pronunciation
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See more Encyclopedia articles on: Chemistry: General

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