- 行业: 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 trigonal mineral, PbAl<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub>(OH)<sub>5</sub>.H<sub>2</sub>O ; crandallite group; forms yellow to brown encrustations; in Cumberland, United Kingdom.
Industry:Mining
A trigonal mineral, PbBi<sub>2</sub>(Se,S)<sub>3</sub>; metallic; iron-black; forms thin plates like graphite; at Falun, Sweden. Also spelled platinite.
Industry:Mining
A trigonal mineral, PbCuAl<sub>2</sub>(SO<sub>4</sub>)<sub>2</sub>(OH)<sub>6</sub>; alunite group; the aluminum analog of beaverite; a yellow, powdery secondary crust; at the Osarizawa Mine, Akita prefecture, Japan.
Industry:Mining
A trigonal mineral, PbFe<sub>4</sub>O<sub>7</sub>; black; at Jakobsberg, Sweden.
Industry:Mining
A trigonal mineral, PbFe<sub>6</sub>(SO<sub>4</sub>)<sub>4</sub>(OH)<sub>12</sub>; alunite group; forms minute brown tabular crystals with rhombohedral cleavage.
Industry:Mining
A trigonal mineral, SrAl<sub>3</sub>(PO<sub>4</sub>)(SO<sub>4</sub>)(OH)<sub>6</sub>; beudantite group; at Wermland and Skane, Sweden.
Industry:Mining
A trigonal mineral, Te , native tellurium; soft; sp gr, 6.2; semimetallic; in pyrite, sulfur, or in the fine dust of gold-telluride mines.
Industry:Mining
A trigonal mineral, V<sub>2</sub>O<sub>3</sub>; hematite group; black; in boulders from the Outokumpu orebody in the Karelian schist belt, Finland.
Industry:Mining
A trigonal mineral, Zn<sub>2</sub>SiO<sub>4</sub>; white to pale tints; fluoresces bright yellow; in zinc deposits in New Jersey, New Mexico, Africa, and Greenland; a source of zinc.
Industry:Mining
A trigonal mineral, Zn<sub>2</sub>SiO<sub>4</sub>; white to pale tints; fluoresces bright yellow; in zinc deposits in New Jersey, New Mexico, Africa, and Greenland; a source of zinc.
Industry:Mining