- المجال: 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, (Mn,Fe)<sub>2</sub>(PO<sub>4</sub>)(OH) ; perfect cleavage.
Industry:Mining
A monoclinic mineral, (Mn,Mg)<sub>3</sub>(AsO<sub>4</sub>)<sub>2</sub>.8H<sub>2</sub>O; vivianite group.
Industry:Mining
A monoclinic mineral, (Mn,Mg)<sub>3</sub>Zn<sub>2</sub>(AsO<sub>4</sub>)(OH,O)<sub>6</sub>; occurs in elongated gray-green crystals at Franklin, NJ.
Industry:Mining
A monoclinic mineral, (Mn,Zn)<sub>2</sub>Te<sub>3</sub>O<sub>8</sub>; red to purple.
Industry:Mining
A monoclinic mineral, (Mn,Zn)<sub>7</sub>(CO<sub>3</sub>)<sub>2</sub>(OH)<sub>10</sub>; soft; bluish white; at Franklin, NJ.
Industry:Mining
A monoclinic mineral, (Mn,Zn,Fe)SO<sub>4</sub>.4H<sub>2</sub>O ; rozenite group; a green, friable crystalline aggregate in Hall Valley, Park County, CO.
Industry:Mining
A monoclinic mineral, (Na, Ca)<sub>2-3</sub>Al<sub>3</sub>(Al, Si)<sub>2</sub>Si<sub>13</sub>O<sub>36</sub>.12H<sub>2</sub>O) ; zeolite group, with extensive substitution of NaSi for CaAl and K predominant over Na; forms in cavities in basalt and andesite, as skarn druses, as diagenetic product in silicic vitreous tuffs, in bentonitic clays, and as authigenic mineral in limestone or sandstone.
Industry:Mining
A monoclinic mineral, (Na,Ca)<sub>0.33</sub>(Al,Mg)<sub>2</sub>Si<sub>4</sub>O<sub>10</sub>(OH)<sub>2</sub>.nH<sub>2</sub>O ; smectite group; expansive and cation exchangeable; perfect basal cleavage; in bentonite clays formed by 2054 alteration of volcanic ash or mafic igneous rocks. The chief constituent of bentonite and fuller's earth. Compare: beidellite; hectorite.
Industry:Mining
A monoclinic mineral, (Na,Ca)<sub>0.33</sub>(Al,Mg)<sub>2</sub>Si<sub>4</sub>O<sub>10</sub>(OH)<sub>2</sub>.nH<sub>2</sub>O ; smectite group; expansive and cation exchangeable; perfect basal cleavage; in bentonite clays formed by 2054 alteration of volcanic ash or mafic igneous rocks. The chief constituent of bentonite and fuller's earth. Compare: beidellite; hectorite.
Industry:Mining
A monoclinic mineral, (Na,Ca)<sub>0.5</sub>(Mn,Mg)<sub>6</sub>O<sub>12</sub>.4H<sub>2</sub>O ; forms black spongy banded and reniform aggregates composed of minute lathlike crystals; in Hokkaido, Japan.
Industry:Mining
