- 行业: Mining
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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 ...
An orthorhombic mineral, Al<sub>2</sub>(PO<sub>4</sub>)F<sub>2</sub>(OH).7H<sub>2</sub>O ; has one distinct cleavage; occurs with secondary iron phosphate minerals in pegmatites. Formerly called kreuzbergite.
Industry:Mining
An orthorhombic mineral, Al<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub>(OH,F)<sub>3</sub>.5H<sub>2</sub>O ; pearly; forms hemispherical radiating aggregates in low-grade aluminous phosphatic rocks; also occurs in veins; a source of phosphorus.
Industry:Mining
An orthorhombic mineral, Al<sub>4</sub>(PO<sub>4</sub>)<sub>3</sub>(OH)<sub>3</sub>.13H<sub>2</sub>O(?) ; at Vashegy, Hungary, and near Manhattan, NV.
Industry:Mining
An orthorhombic mineral, Al<sub>7</sub>(BO<sub>3</sub>)(SiO<sub>4</sub>)<sub>3</sub>O<sub>3</sub>; fibrous or radiating; Mohs hardness, 7 to 8-1/2; in schists, gneisses, and pegmatite dikes.
Industry:Mining
An orthorhombic mineral, AlAsO<sub>4</sub>.2H<sub>2</sub>O ; variscite group; forms a series with scorodite.
Industry:Mining
An orthorhombic mineral, AlO(OH) ; white, colorless, or pale tints; in bauxite and emery deposits; a source of aluminum. Formerly spelled disaporite.
Industry:Mining
An orthorhombic mineral, AlO(OH) ; white, colorless, or pale tints; in bauxite and emery deposits; a source of aluminum. Formerly spelled disaporite.
Industry:Mining
An orthorhombic mineral, alpha-Fe<sub>3+</sub>O(OH) ; polymorphous with akaganeite, feroxyhyte, and lepidocrocite; dull to adamantine, varicolored with yellow ocher streak; a common weathering product of iron-bearing minerals; precipitates in bogs and springs; a major constituent of limonite and gossans, and a source of iron and a yellow ochre pigment. A hydrous oxide mineral of iron. Also spelled goethite, gothite. Formerly called allcharite; xanthosiderite. Compare: bog iron
Industry:Mining
An orthorhombic mineral, aluminum oxyhydroxide (gamma -AlO(OH)); grayish, brownish, or reddish, in some bauxites and laterites; an ore of aluminum, dimorphous with diaspore. Also spelled boehmite.
Industry:Mining
An orthorhombic mineral, As<sub>4</sub>S<sub>3</sub>; orange-yellow; a volcanic product closely related to orpiment.
Industry:Mining
