- 行业: Mining
- Number of terms: 33118
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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, (Fe<sub>2+</sub>,Fe<sub>3+</sub>)<sub>2-3</sub>Si<sub>2</sub>O<sub>5</sub>(OH)<sub>4</sub>; kaolinite-serpentine group; forms green granules in the taconite of the Mesabi Range, MN, and the Gogebic iron formation of northern Wisconsin.
Industry:Mining
A monoclinic mineral, (Fe<sub>2+</sub>,Fe<sub>3+</sub>,Mg)<sub>2-2D3</sub>(Si,Al)<sub>2</sub>O<sub>5</sub>(OH)<sub>4</sub>of the kaolinite-serpentine group; dark steel-gray; in low-temperature vein deposits.
Industry:Mining
A monoclinic mineral, (Fe<sub>2+</sub>,Fe<sub>3+</sub>,Mg)<sub>2-2D3</sub>(Si,Al)<sub>2</sub>O<sub>5</sub>(OH)<sub>4</sub>of the kaolinite-serpentine group; dark steel-gray; in low-temperature vein deposits.
Industry:Mining
A monoclinic mineral, (H<sub>3</sub>O)<sub>2</sub>Mg(UO<sub>2</sub>)<sub>2</sub>(SiO<sub>4</sub>)<sub>2</sub>.2H<sub>2</sub>O ; structurally similar to uranophane and cuprosklodowskite; strongly radioactive; citron-yellow. Also spelled sklodovskite.
Industry:Mining
A monoclinic mineral, (K,Ba)(Na,Ca)<sub>5</sub>(Mn,Fe,Mg)<sub>14</sub>Al(PO<sub>4</sub>)<sub>12</sub>(OH,F)<sub>2</sub>; forms a series with arrojadite.
Industry:Mining
A monoclinic mineral, (K,Ba,Na)(Ti,Nb)(Si,Al)<sub>2</sub>(O,OH)<sub>7</sub>.H<sub>2</sub>O . Also spelled labuntzovite; labountsovite.
Industry:Mining
A monoclinic mineral, (K,Na,Ca)<sub>1-2</sub>(Si,Al)<sub>8</sub>O<sub>16</sub>.6H<sub>2</sub>O ; zeolite group; commonly occurs in complex twinned crystals; in basalt amydules, in pelagic red clays, in palagonite tuffs, in alkaline saline lakes from silicic vitric volcanic ash, in alkaline soils, and around hot springs in Roman baths.
Industry:Mining
A monoclinic mineral, (Mg,Al)<sub>8</sub>Si<sub>4</sub>(O,OH)<sub>20</sub>; purple; highly pleochroic; in a quartzyoderite- kyanite-talc schist at Mautia Hill, Kongwa, Tanzania.
Industry:Mining
A monoclinic mineral, (Mg,Fe)<sub>2</sub>(PO<sub>4</sub>)F ; magnesium is replaced by ferrous iron or calcium; imperfect cleavage.
Industry:Mining
A monoclinic mineral, (Mg,Fe)<sub>3</sub>(Al,Fe)<sub>4</sub>(PO<sub>4</sub>)<sub>4</sub>(OH)<sub>6</sub>.2H<sub>2</sub>O ; forms a series with gormanite; green.
Industry:Mining
