- 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 tetragonal mineral, 3NaAlSi<sub>3</sub>O<sub>8</sub>.NaCl ; scapolite group; forms a series with meionite.
Industry:Mining
A tetragonal mineral, 4(Pb<sub>2</sub>(CO<sub>3</sub>)Cl<sub>2</sub>) ; forms stubby crystals; may be massive; adamantine; sp gr, 6.13; a secondary mineral in lead deposits and from action of seawater on lead slags and artifacts; commonly associated with cerussite and anglesite.
Industry:Mining
A tetragonal mineral, 4(Pb<sub>2</sub>(CO<sub>3</sub>)Cl<sub>2</sub>) ; forms stubby crystals; may be massive; adamantine; sp gr, 6.13; a secondary mineral in lead deposits and from action of seawater on lead slags and artifacts; commonly associated with cerussite and anglesite.
Industry:Mining
A tetragonal mineral, 4(PbWO<sub>4</sub>) ; dimorphous with raspite; crystallizes in bipyramids; sp gr, 7.9 to 8.3; in oxidized zones of tungsten deposits.
Industry:Mining
A tetragonal mineral, 4(SnO<sub>2</sub>) ; rutile group; adamantine; reddish brown to black; forms prismatic crystals, or massive concentric fibrous structure (wood tin); sp gr, 7.03; occurs in veins associated with granite and granite pegmatite, or placers (stream tin); a source of tin.
Industry:Mining
A tetragonal mineral, 4(SnO<sub>2</sub>) ; rutile group; adamantine; reddish brown to black; forms prismatic crystals, or massive concentric fibrous structure (wood tin); sp gr, 7.03; occurs in veins associated with granite and granite pegmatite, or placers (stream tin); a source of tin.
Industry:Mining
A tetragonal mineral, 4(SnO<sub>2</sub>) ; rutile group; adamantine; reddish brown to black; forms prismatic crystals, or massive concentric fibrous structure (wood tin); sp gr, 7.03; occurs in veins associated with granite and granite pegmatite, or placers (stream tin); a source of tin.
Industry:Mining
A tetragonal mineral, 4(SnO<sub>2</sub>) ; rutile group; adamantine; reddish brown to black; forms prismatic crystals, or massive concentric fibrous structure (wood tin); sp gr, 7.03; occurs in veins associated with granite and granite pegmatite, or placers (stream tin); a source of tin.
Industry:Mining
A tetragonal mineral, 4(SnO<sub>2</sub>) ; rutile group; adamantine; reddish brown to black; forms prismatic crystals, or massive concentric fibrous structure (wood tin); sp gr, 7.03; occurs in veins associated with granite and granite pegmatite, or placers (stream tin); a source of tin.
Industry:Mining
A tetragonal mineral, 4(TiO<sub>2</sub>) ; trimorphous with rutile and brookite; brown, greenishgray, or black; in hydrothermal veins around granite pegmatites, as an alteration of titanium minerals, and as detrital grains. Formerly called octahedrite.
Industry:Mining
