Crystal Definition, Examples, and Common Types - ThoughtCo
https://www.thoughtco.com/what-is-a-crystal-607656
Sep 13, 2019 · By. Anne Marie Helmenstine, Ph.D. Updated on September 13, 2019. A crystal consists of matter that is formed from an ordered arrangement of atoms, molecules, or ions. The lattice that forms extends out in three dimensions. Because there are repeated units, crystals have recognizable structures.
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