Crystal
This is an old revision of this page, as edited by BrianCo (talk | contribs) at 21:36, July 14, 2007. It may differ significantly from current revision.
A crystal is a substance in which the constituent atoms are arranged in a consistent, repetitive, and therefore orderly pattern. Crystals are extremely common, forming the basis for many rocks and minerals, and playing a large part in the biological processes of many organisms.