- 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 ...
An isometric mineral, (K,Ca,Na)(W<sub>6</sub>,Fe<sub>3</sub>)(O,OH)<sub>6</sub>.H<sub>2</sub>O ; in minute yellow octahedra and platy aggregates; in Uganda, Rwanda, Zaire, Portugal, France, Washington, and Nevada.
Industry:Mining
An isometric mineral, (K<sub>2</sub>,Ca,Na<sub>2</sub>,Ba)<sub>5</sub>(Al<sub>10</sub>Si<sub>32</sub>O<sub>84</sub>).34-44H<sub>2</sub>O ; zeolite group; forms rhombic dodecahedra; at the Columbia River Rock Island Dam, Wenatchee, WA.
Industry:Mining
An isometric mineral, (Mn,Ca)(Fe,Al)<sub>2</sub>(SiO<sub>4</sub>)<sub>3</sub>; the dark reddish-brown manganeseiron end member of the garnet group.
Industry:Mining
An isometric mineral, (Mn,Fe)<sub>2</sub>O<sub>3</sub>; forms black cubes. Formerly called partridgeite and sitaparite.
Industry:Mining
An isometric mineral, (Mn<sub>+2</sub>,Fe<sub>+2</sub>,Mg)(Al,Fe<sub>+3</sub>)<sub>2</sub>O<sub>4</sub>; spinel group; occurs as black grains in Galax, Alleghany County, NC; Ioi Mine, Shiga Prefecture, and Oashi mine, Tochigi Prefecture, Japan.
Industry:Mining
An isometric mineral, (NH<sub>4</sub>)<sub>2</sub>SiF<sub>6</sub>; dimorphous with bararite.
Industry:Mining
An isometric mineral, (Ni,Co,Cu)Se<sub>2</sub>; pyrite group; cubic cleavage; forms radiating columnar masses; occurs in Bolivian mines near Colquechaca. Formerly called blockite.
Industry:Mining
An isometric mineral, (Pb,Ca,U)<sub>2</sub>Ta<sub>2</sub>O<sub>6</sub>(OH); pyrochlore group. It occurs in greenishyellow and orange masses and octahedra from Kivu, Zaire.
Industry:Mining
An isometric mineral, (Pd,Pt)BiTe ; pyrite group; metallic; at Sudbury, ON, Canada and Monchegorsk, Kola Peninsula, Russia.
Industry:Mining