- 行业: Mining
- Number of terms: 33118
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- 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>2</sub>(Mg,Fe)<sub>3</sub>(Al,Fe)<sub>2</sub>Si<sub>8</sub>O<sub>22</sub>(OH)<sub>2</sub>; amphibole group with Fe<sub>3+</sub>/(Fe<sub>3+</sub>+Al)=0.3-0.7 . Compare: glaucophane
Industry:Mining
A monoclinic mineral, Na<sub>2</sub>(Sb,As)<sub>8</sub>S<sub>13</sub>.2H<sub>2</sub>O; dark red; soft; in fine granular aggregates, groups of small plates, or spherules in clay, with borates at the Baker Mine, Kramer district, Kern County, CA.
Industry:Mining
A monoclinic mineral, Na<sub>2</sub>(Sr,Ba)<sub>2</sub>Ti<sub>3</sub>(SiO<sub>4</sub>)<sub>4</sub>(OH,F)<sub>2</sub>.
Industry:Mining
A monoclinic mineral, Na<sub>2</sub>(Sr,Ba)<sub>2</sub>Ti<sub>3</sub>(SiO<sub>4</sub>)<sub>4</sub>(OH,F)<sub>2</sub>.
Industry:Mining
A monoclinic mineral, Na<sub>2</sub>(Ti,Fe)<sub>8</sub>O<sub>16</sub>; forms pseudohexagonal crystals in an apatiterich alkali pegmatite at Katzenbuckel, Odenwald, Germany.
Industry:Mining
A monoclinic mineral, Na<sub>2</sub>Ca(CO<sub>3</sub>)<sub>2</sub>.5H<sub>2</sub>O ; soft; in flattened and elongated crystals in muds from playa lakes in the Mohave Desert, CA, and the Gobi Desert, Mongolia.
Industry:Mining
A monoclinic mineral, Na<sub>2</sub>Ca(MgFe<sub>+2</sub>)<sub>5</sub>Si<sub>8</sub>O<sub>22</sub>(OH)<sub>2</sub>; amphibole group with Mg/(Mg+Fe<sub>2+</sub>) = 0 to 0.49 and Fe<sub>3+</sub>/(Fe<sub>3+</sub>+Al) = 0.7 to 1.0; forms a series with magnesioriebeckite; fibrous; in soda-rich rhyolites, granites, and pegmatites; crocidolite variety is blue asbestos, tiger eye is crocidolite replaced by quartz. Compare: glaucophane
Industry:Mining
A monoclinic mineral, Na<sub>2</sub>Ca(SO<sub>4</sub>)<sub>2</sub>; slightly salty tasting; in evaporite deposits and fumarolic crusts; a source of sodium sulfate.
Industry:Mining
A monoclinic mineral, Na<sub>2</sub>Ca<sub>2</sub>(Al<sub>2</sub>Si<sub>3</sub>O<sub>10</sub>)<sub>3</sub>.8H<sub>2</sub>O ; zeolite group; pseudoorthorhombic; in cavities in basalt and andesite, geodes, and hydrothermal veins.
Industry:Mining
A monoclinic mineral, Na<sub>2</sub>Ca<sub>2</sub>(Al<sub>2</sub>Si<sub>3</sub>O<sub>10</sub>)<sub>3</sub>.8H<sub>2</sub>O ; zeolite group; pseudoorthorhombic; in cavities in basalt and andesite, geodes, and hydrothermal veins.
Industry:Mining
