- المجال: Mining
- Number of terms: 33118
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- Company Profile:
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 monoclinic mineral, PbWO<sub>4</sub>; dimorphous with stolzite; forms small tabular brownishyellow crystals having intense adamantine luster; at Broken Hill, N.S.W., Australia.
Industry:Mining
A monoclinic mineral, PdBi<sub>2</sub>; forms minute metallic grains in mill concentrates at the Frood Mine, Sudbury, ON, Canada.
Industry:Mining
A monoclinic mineral, SiO<sub>2</sub>; polymorphous with cristobalite, quartz, tridymite, and stishovite; insoluble in hydrogen fluoride.
Industry:Mining
A monoclinic mineral, SnTa<sub>2</sub>O<sub>6</sub>; forms a series with foordite; brown; in pegmatite at Katanga, Congo.
Industry:Mining