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Trona |
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trona [′trō·nə]
(mineralogy) Na2(CO3)·Na(HCO3)·2H2O A gray-white or yellowish-white mineral that crystallizes in the monoclinic system and occurs in fibrous or columnar layers or masses. Also known as urao. Trona a mineral of the subclass of simple hydrous carbonates Na3H[CO3]2·2H2O. Trona crystallizes in the monoclinic system, usually forming grayish or yellowish-white granular or powdery masses. It has a hardness of 2.5–3.0 on Mohs’ scale and a density of 2,140–2, 170 kg/m3. It is freely soluble in water. Trona occurs in salt lake deposits in association with soda, thermonatrite, and mirabilite and is used as a raw material for soda manufacture. There are trona deposits in the lakes of the Kulunda Steppe (USSR) and California and Nevada (USA) and in the lakes of the Arab Republic of Egypt. Large stratified deposits are found in the USA, in Wyoming. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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