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United States Bureau of Mines
Industry: 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, manganese sulfide, MnS ; iron-black; in epithermal vein deposits; an ore of manganese. Formerly called alabandine.
Industry:Mining
An isometric mineral, MgCr<sub>2</sub>O<sub>4</sub>; chromite series; spinel group; forms series with spinel and with chromite; crystallizes in black octahedra, but commonly massive. Also spelled magnochromite.
Industry:Mining
An isometric mineral, MgCr<sub>2</sub>O<sub>4</sub>; chromite series; spinel group; forms series with spinel and with chromite; crystallizes in black octahedra, but commonly massive. Also spelled magnochromite.
Industry:Mining
An isometric mineral, MgFe<sub>2</sub>O<sub>4</sub>; magnetite series; spinel group; strongly ferrimagnetic. Also spelled magnoferrite.
Industry:Mining
An isometric mineral, MnO ; periclase group; emerald-green; forms octahedra that blacken on exposure to air.
Industry:Mining
An isometric mineral, Na<sub>21</sub>Mg(SO<sub>4</sub>)<sub>10</sub>Cl<sub>3</sub>.
Industry:Mining
An isometric mineral, Na<sub>3</sub>Li<sub>3</sub>Al<sub>2</sub>F<sub>12</sub>; forms large colorless rhombic dodecahedra; at Ivigtut, Greenland, and the Ural Mountains, Russia.
Industry:Mining
An isometric mineral, Na<sub>6</sub>Mg<sub>2</sub>(CO<sub>3</sub>)<sub>4</sub>(SO<sub>4</sub>) , having iron replacing magnesium toward ferrotychite; isomorphous with northupite, Na<sub>6</sub>Mg<sub>2</sub>(CO<sub>3</sub>)<sub>4</sub>Cl<sub>2</sub>, with which it occurs; forms small white octahedra; at Borax Lake, San Bernadino County, CA.
Industry:Mining
An isometric mineral, Na<sub>8</sub>Al<sub>6</sub>Si<sub>6</sub>O<sub>24</sub>(SO<sub>4</sub>).H<sub>2</sub>O ; sodalite group; occurs in silica- and lime-deficient igneous rocks. Formerly called noselite, nosin, nosite.
Industry:Mining
An isometric mineral, Na<sub>x</sub>Mg<sub>x</sub>Al<sub>2-x</sub>(F,OH)<sub>6</sub>.H<sub>2</sub>O ; structurally related to the pyrochlore group; occurs as octahedra.
Industry:Mining