- 업종: 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 hexagonal mineral, (Na<sub>2</sub>,Ca)Al<sub>2</sub>Si<sub>4</sub>O<sub>12</sub>.6H<sub>2</sub>O ; zeolite group; forms transparent to translucent, pyramidal or tabular crystals, with other zeolites, in the amygdules of basaltic lava.
Industry:Mining
A hexagonal mineral, (NH<sub>4</sub>)<sub>2</sub>SiF<sub>6</sub>; dimorphous with cryptohalite; occurs over a burning coal seam.
Industry:Mining
A hexagonal mineral, (RE,Ca)Cu<sub>6</sub>(AsO<sub>4</sub>)<sub>3</sub>(OH)<sub>6</sub>.3H<sub>2</sub>O ; mixite group.Lanthanum, yttrium, or cerium may predominate among the rare earths.
Industry:Mining
A hexagonal mineral, (Sr,Ce,Na,Ca)<sub>5</sub>(PO<sub>4</sub>)<sub>3</sub>(OH) ; apatite group; occurs in pegmatites.
Industry:Mining
A hexagonal mineral, (V,Fe,Ti)<sub>10</sub>O<sub>14</sub>(OH)<sub>2</sub>; rare; forms tabular prisms and plates; associated with uranium ores at Beaverlodge, SK, Canda, and with native gold and various tellurides at Kalgoorlie, Western Australia.
Industry:Mining
A hexagonal mineral, (Zn,Cu)<sub>10</sub>Al<sub>6</sub>(SO<sub>4</sub>)<sub>3</sub>(OH)<sub>32</sub>.18H<sub>2</sub>O ; forms soft, blue, fibrousbotryoidal coating on adamite; associated with malachite, smithsonite, and gypsum at Laurium, Greece.
Industry:Mining
A hexagonal mineral, 1.53((Mg,Al)(OH)<sub>2</sub>).((Fe,Cu)S) ; an irrational but discrete interlayer complex of hydroxide and sulfide layers; massive; soft; resembles pyrrhotite in color.
Industry:Mining
A hexagonal mineral, 2(BaTiSi<sub>3</sub>O<sub>9</sub>) ; occurs in double pyramids; colorless, white, or blue, resembling sapphire; in veins in serpentine schist.
Industry:Mining
A hexagonal mineral, 2(CdS) ; forms earthy incrustations and coatings on sphalerite and other zinc ores; rarely in amygdules.
Industry:Mining
A hexagonal mineral, 2(KAlSiO<sub>4</sub>) ; polymorphous with kaliophilite, panunzite, and trikalsilite; forms a partial series toward nepheline; in groundmasses of potassium-rich, silica-poor lavas and as an alteration of blast furnace brick.
Industry:Mining
