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United States Bureau of Mines
行业: Mining
Number of terms: 33118
Number of blossaries: 0
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 hexagonal mineral, CuS ; metallic indigo blue with iridescent tarnish; soft; a supergene mineral in copper deposits; a source of copper.
Industry:Mining
A hexagonal mineral, CuSe ; slate gray to reddish violet, tarnishing to blue-black; basal cleavage. Occurs at Sierra de Umango, Argentina; Harz Mountains, Germany; and Skrikerum, Sweden.
Industry:Mining
A hexagonal mineral, FeS ; a meteorite mineral related to pyrrhotite, Fe<sub>1-x</sub>S , in terrestrial rocks.
Industry:Mining
A hexagonal mineral, Hg<sub>2</sub>N(Cl,SO<sub>4</sub>).nH<sub>2</sub>O ; yellow to orange; occurs as short prisms darkening on exposure; sp gr, 8.0; in Brewster County, TX.
Industry:Mining
A hexagonal mineral, Hg<sub>3</sub>(SO<sub>4</sub>)O<sub>2</sub>; yellow.
Industry:Mining
A hexagonal mineral, K<sub>2</sub>Ca(CO<sub>3</sub>)<sub>2</sub>; dimorphous with bueschliite; in fused wood ash in partly burned trees.
Industry:Mining
A hexagonal mineral, K<sub>2</sub>CaZ.(SiO<sub>3</sub>)<sub>4</sub>; forms hexagonal plates; in Western Australia.
Industry:Mining
A hexagonal mineral, K<sub>2</sub>Na<sub>6</sub>Fe<sub>7</sub>(SO<sub>4</sub>)<sub>12</sub>O<sub>2</sub>.18H<sub>2</sub>O .
Industry:Mining
A hexagonal mineral, KAlSiO<sub>4</sub>; polymorphous with kalsilite, panunzite, and trikalsilite.
Industry:Mining
A hexagonal mineral, KAlSiO<sub>4</sub>; polymorphous with kalsilite, panunzite, and trikalsilite.
Industry:Mining
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