For the community in California formerly named Colemanite, see Ryan, California
Colemanite (CaB3O4(OH)3·H2O) is a borate mineral found in evaporite deposits of alkaline lacustrine environments. Colemanite is a secondary mineral that forms by alteration of borax and ulexite.
It was first described in 1884 for an occurrence near Furnace Creek in Death Valley and was named after William Tell Coleman (1824–1893), owner of the mine Harmony Borax Works where it was first found. At the time, Coleman had alternatively proposed the name "smithite" instead after his business associate Francis Marion Smith.
Colemanite is an important ore of boron, and was the most important boron ore until the discovery of kernite in 1926. It has many industrial uses, like the manufacturing of heat resistant glass.
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- ^ a b http://www.mindat.org/min-1108.html Mindat
- ^ http://webmineral.com/data/Colemanite.shtml Webmineral
- ^ http://rruff.geo.arizona.edu/doclib/hom/colemanite.pdf Handbook of Mineralogy
- ^ Hildebrand, GH. (1982) Borax Pioneer: Francis Marion Smith. San Diego: Howell-North Books. p 31 ISBN 0-8310-7148-6
- ^ "Nitrates". Simon & Schuster's Guide to Rocks and Minerals. Simon & Schuster. 1977. p. entry 111. ISBN 978-0-671-24417-0.
Spencer, Leonard James (1911). "Colemanite". In Chisholm, Hugh. Encyclopædia Britannica 6 (11th ed.). Cambridge University Press. p. 665.