- 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, CaAl<sub>3</sub>(SO<sub>4</sub>)(PO<sub>4</sub>)(OH)<sub>6</sub>; beudantite group; forms small colorless rhombohedra.
Industry:Mining
A trigonal mineral, CaMg<sub>2</sub>Cl<sub>6</sub>.12H<sub>2</sub>O . Also spelled tachydrite or tachhydrite.
Industry:Mining
A trigonal mineral, CaMg<sub>3</sub>(CO<sub>3</sub>)<sub>4</sub>; in white chalky masses in caves; as a weathering product in vugs and veins in magnesium-rich rocks; in magnesite deposits in Nevada.
Industry:Mining
A trigonal mineral, CdCO<sub>3</sub>; calcite group; associated with oxidized base-metal ores.
Industry:Mining
A trigonal mineral, CoCO<sub>3</sub>; calcite group; forms peach-blossom red spherical masses. Also spelled spherocobaltite.
Industry:Mining
A trigonal mineral, CoCO<sub>3</sub>; calcite group; forms peach-blossom red spherical masses. Also spelled spherocobaltite.
Industry:Mining
A trigonal mineral, Cr<sub>2</sub>O<sub>3</sub>; hematite group; easily confused with hematite and magnetite; in a chromium-bearing tremolite skarn at the Outokumpu Mine, Finland.
Industry:Mining