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The '''halides''' are [[compounds]] in which a [[halogen]] [[element]] ([[chlorine]], [[fluorine]], [[iodine]], or [[bromine]]) is the sole [[anion]], as in [[halite]], NaCl. These [[minerals]] are relatively soft, weak, and [[brittle]], and many of them will [[dissolve]] readily in [[water]]. Those that are not [[soluble]] in water generally [[crystallize]] in the [[isometric]] [[crystal system]] and develop as [[cubes]]. Chesterman, p. 425
=Sources=
*Chesterman, Charles W. ''The Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf: New York (1987)
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