hydroboracite

hydroboracite

[‚hī·drō′bȯr·ə‚sīt]
(mineralogy)
CaMgB6O11·6H2O A white mineral composed of hydrous calcium magnesium borate, occurring in fibrous and foliated masses.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
[square] v.1/n.4 Colombian Emerald, Natrolite (OR), Benstonite (IL), Langban (Sweden) $30 [square] v.8/n.5 Characterization of New Species, Twinning, Axinite (Brazil), Green River (WY) [square] v.9/n.4 Elmwood mine (TN), Chester (MA), Pyrite crystal forms [square] v.9/n.5 Kammererite (Turkey), Afghanistan pegmatites, Chuquicamata, Chile [square] v.9/n.6 Libethenite (Zambia), Quartz/Pyrite (Washington), Hydroboracite (CA) [square] v.10/n.1 Hydroxylherderite (Brazil), References on American Minerals [square] v.10/n.2 Jeffrey mine (Quebec), Alpine Rodingites, Fluorite (Germany) [square] v.10/n.3 Taewha mine (Korea), Quartz Japan-law Twins, Bancroft (Ontario) [square] v.10/n.5 Thomas and Wah Wah Mountains (UT) Topaz, Red Beryl, Etc.
More than 230 different types of boron minerals are known in nature, but the number having commercial importance is limited to the following: tincal, colemanite, kernite, ulexite, pandermite, boracite, szaibelyite and hydroboracite. Commonly existing boron minerals in Turkey are tincal, colemanite and ulexite.
But what the miner did not know, and you did, is that one of the specimens is mostly hydroboracite and not colemanite, and is the finest specimen of that mineral known.
The crushed ores are colemanite (Ca2B6O .5H O), ulexite (Na O.2CaO.5B2O3.16H2O), datolite (2CaO.B2O3.2SiO2.H2O), hydroboracite (CaO.MgO.3B2O3.6H2O) and ascharite (2MgO.B2O3.H2O).