- 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 hexagonal mineral, Pb<sub>5</sub>(PO<sub>4</sub>)<sub>3</sub>Cl ; apatite group, with iron replacing lead and arsenic replacing phosphorous; sp gr, 6 to 7; in oxidized zones of lead-ore deposits.
Industry:Mining
A hexagonal mineral, Pb<sub>5</sub>(PO<sub>4</sub>)<sub>3</sub>Cl ; apatite group, with iron replacing lead and arsenic replacing phosphorous; sp gr, 6 to 7; in oxidized zones of lead-ore deposits.
Industry:Mining
A hexagonal mineral, Pb<sub>5</sub>(VO<sub>4</sub>)<sub>3</sub>Cl ; apatite group; soft; varicolored; sp gr, 6.7 to 7.1; in oxidized zones of lead ore deposits; in New Mexico, Arizona, Africa, Scotland, and Russia.
Industry:Mining
A hexagonal mineral, Pb<sub>5</sub>(VO<sub>4</sub>)<sub>3</sub>Cl ; apatite group; soft; varicolored; sp gr, 6.7 to 7.1; in oxidized zones of lead ore deposits; in New Mexico, Arizona, Africa, Scotland, and Russia.
Industry:Mining
A hexagonal mineral, Pb<sub>9</sub>Sb<sub>22</sub>S<sub>42</sub>; in steel-gray crystals or exceptionally thin folia in fibrous masses. Also spelled zinckenite.
Industry:Mining
A hexagonal mineral, Pb<sub>9</sub>Sb<sub>22</sub>S<sub>42</sub>; in steel-gray crystals or exceptionally thin folia in fibrous masses. Also spelled zinckenite.
Industry:Mining
A hexagonal mineral, Pd<sub>5</sub>Sb<sub>2</sub>; sp gr, 9.5; occurs with platinum ores; a source of platinum and palladium.
Industry:Mining
A hexagonal mineral, Pd<sub>5</sub>Sb<sub>2</sub>; sp gr, 9.5; occurs with platinum ores; a source of platinum and palladium.
Industry:Mining