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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 ...
A monoclinic mineral, Na<sub>3</sub>(Fe<sub>+2</sub>,Mg)<sub>4</sub>Fe<sub>+3</sub>Si<sub>8</sub>O<sub>22</sub>(OH)<sub>2</sub>, of the amphibole group; dark green to black; in silica-poor igneous rocks.
Industry:Mining
A monoclinic mineral, Na<sub>3</sub>(Fe<sub>2+</sub>,Mg)<sub>4</sub>AlSi<sub>8</sub>O<sub>22</sub>(OH)<sub>2</sub>; amphibole group; has Mg/(Mg+Fe<sub>2+</sub>) &#61; 0 to 0.49; forms a series with eckermannite.
Industry:Mining
A monoclinic mineral, Na<sub>3</sub>(Mg,Fe)<sub>4</sub>AlSi<sub>8</sub>O<sub>22</sub>(OH)<sub>2</sub>; amphibole group with Mg/(Mg + Fe<sub>2+</sub>) &#61; 0.5 to 1.0 and Fe<sub>3+</sub>/(Fe<sub>3+</sub>+ Al) &#61; 0 to 0.5; fibrous; in nepheline syenites; an asbestos mineral.
Industry:Mining
A monoclinic mineral, Na<sub>3</sub>(SO<sub>4</sub>)(NO<sub>3</sub>).H<sub>2</sub>O .
Industry:Mining
A monoclinic mineral, Na<sub>3</sub>AlF<sub>6</sub>; waxy colorless to white (disappears in water owing to low refractive index); soft; in veinlike cleavable masses in granite at Ivigtut, Greenland.
Industry:Mining
A monoclinic mineral, Na<sub>3</sub>AlF<sub>6</sub>; waxy colorless to white (disappears in water owing to low refractive index); soft; in veinlike cleavable masses in granite at Ivigtut, Greenland.
Industry:Mining
A monoclinic mineral, Na<sub>3</sub>AlF<sub>6</sub>; waxy colorless to white (disappears in water owing to low refractive index); soft; in veinlike cleavable masses in granite at Ivigtut, Greenland.
Industry:Mining
A monoclinic mineral, Na<sub>3</sub>Mg(PO<sub>4</sub>)(CO<sub>3</sub>) ; in veryfine grains in saline oil shale in Wyoming.
Industry:Mining
A monoclinic mineral, Na<sub>3</sub>Pb<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub>Cl ; pseudohexagonal; forms crystalline incrustations.
Industry:Mining
A monoclinic mineral, Na<sub>4</sub>Mn<sub>14</sub>O<sub>27</sub>.9H<sub>2</sub>O ; black or dark-brown, named for Birness, Scotland.
Industry:Mining