Plastic crystals

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Revision as of 16:06, 23 July 2007 by Carl McBride (talk | contribs) (New page: '''Plastic crystals''' are a state of matter whose ''almost''-spherical molecules are located on crystalline lattice points, but have a degree of rotational disorder. Plastic crystals exi...)
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Plastic crystals are a state of matter whose almost-spherical molecules are located on crystalline lattice points, but have a degree of rotational disorder. Plastic crystals exist over a narrow temperature range; the temperature being sufficiently high so as to overcome any rotational energy barriers, but sufficiently low so as not to disrupt the lattice structure.