- المجال: Mining
- Number of terms: 33118
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The U.S. Bureau of Mines (USBM) was the primary United States Government agency conducting scientific research and disseminating information on the extraction, processing, use, and conservation of mineral resources.
Founded on May 16, 1910, through the Organic Act (Public Law 179), USBM's missions ...
A silver ore consisting of a mixture of sulfides, arsenides, etc., and containing cobalt, nickel, and lead. Compare: animikite
Industry:Mining
A silver refining process using carbon cathodes, dore anodes, and a silver nitrate-nitric acid electrolyte. The silver is scraped off the bottom as crystals.
Industry:Mining
A silver-white to steel-gray sulfantimonide of iron, FeSbS. Isomorphous with arsenopyrite; elongated crystals; orthorhombic. From Gudmundstrop, Sweden.
Industry:Mining
A silvery white, soft and ductile alkaline element, of the rare-earth metals. Symbol, Cs. Occurs in lepidolite and pollucite. Reacts explosively with cold water. Because of its great affinity for oxygen, the metal is used as a "getter" in electron tubes and as a catalyst in the hydrogenation of certain organic compounds; it has recently found application in ion propulsion systems.
Industry:Mining
A silvery-gray or iron-gray, metallic element. Symbol, Ti. Found in nature only in combined form; occurs chiefly in ilmenite (FeTiO<sub>3</sub>), and in rutile and titanite. Used as an alloying agent with aluminum, molybdenum, manganese, iron, and other metals. Used in aircraft and missiles and has potential for use in desalination plants.
Industry:Mining
A silvery-white metallic element that develops a slightly yellowish or pinkish cast upon exposure to air. Symbol, Sc. It occurs as a principal component in the rare mineral thortveitite; or is extracted as a by-product from uranium mill tailings. It is of interest for use in space missiles.
Industry:Mining
A silvery-white, alkaline-earth metal. Symbol, Sr. It does not occur naturally; found chiefly as celestite (SrSO<sub>4</sub>) and strontianite (SrCO<sub>3</sub>). Major use at present is for color television picture tubes.
Industry:Mining
A silvery-white, metallic element, belonging to the alkaline earth group. Symbol, Ba. Found chiefly in barite or heavy spar and witherite. All barium compounds that are water or acid soluble are poisonous. Used in paint, X-ray diagnostic work, glassmaking, oilwell drilling fluids, and pyrotechny.
Industry:Mining
