Also found in: Dictionary, Medical, Wikipedia.
Related to Trona: borax


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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



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.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Fifty years of Wyoming trona mining // 48th Guidebook, Prospect to Pipeline.
Bitter kolas are ground with Trona and the derived powder is then added to the lime juice.
Emotional atrophy is epidemic in Trona, although you can see it all getting better, especially when gas-station mini-mogul Merl (Danny DeVito) arrives in town and asks, "Got any dreams, Ray?"
We continue in this vein in this month's issue, with articles on Rhone Poulenc's Big Island trona (natural sodium carbonate) mine in Wyoming, U.S., a review of Canadian industrial minerals and a discussion of all-important factors for these generally low-priced commodities, their transport and marketing.
The quakes buckled highways and ruptured gas lines that sparked several house fires, and officials said about 50 homes in the nearby small town of Trona were damaged.
The quake did not appear to have caused major damage to roads and bridges in the area, but it did open three cracks across a short stretch of State Route 178 near the tiny town of Trona, said California Department of Transportation district spokeswoman Christine Knadler.
A Trona, or sodium carbonate, mine lends itself to high concentrations of extremely irritable dust.
Marsha Tysnky, president/CEO for the $171 million, Green River, Wyo.-based Trona Valley Federal Credit Union, will retire Jan.
The investment in OCI Wyoming, which runs a trona ore mining operation and a soda ash refinery in Green River, Wyoming, diversifies further NRP's revenues, the buyer's president, Nick Carter, noted.Country: USASector: Metals/Mining, ChemicalsTarget: OCI Wyoming LP , OCI Wyoming CompanyBuyer: Natural Resource Partners LP Vendor: Anadarko Petroleum CorpDeal size in USD: 342.5mType: StakebuildingFinancing: Cash & DebtStatus: ClosedComment: Deal size refers to maximum net price.
She married Robert McCumsey in 1941 in Trona, Calif.