- 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, Ca/2)<sub>0.3</sub>Mg<sub>3</sub>Si<sub>4</sub>O<sub>10</sub>(OH)<sub>2</sub>; smectite group; with no tetrahedral substitution of Al for Si, its layer charge arises from octahedral vacancies.
Industry:Mining
A monoclinic mineral, Ca/2)<sub>0.3</sub>Mg<sub>3</sub>Si<sub>4</sub>O<sub>10</sub>(OH)<sub>2</sub>; smectite group; with no tetrahedral substitution of Al for Si, its layer charge arises from octahedral vacancies.
Industry:Mining
A monoclinic mineral, Ca(Al<sub>2</sub>Si<sub>6</sub>O<sub>16</sub>).5H<sub>2</sub>O ; zeolite group; dimorphous with goosecreekite; forms radiating spherical aggregates of prismatic crystals in cavities in basalt and andesite, or with beryl in pegmatites.
Industry:Mining
A monoclinic mineral, Ca<sub>0.3</sub>(Cr,Mg,Fe)<sub>2</sub>(Si,Al)<sub>4</sub>O<sub>10</sub>(OH)<sub>2</sub>.4H<sub>2</sub>O ; smectite group. Also spelled volchonskoite.
Industry:Mining
A monoclinic mineral, Ca<sub>12</sub>Al<sub>2</sub>Si<sub>18</sub>O<sub>51</sub>.18H<sub>2</sub>O .
Industry:Mining
A monoclinic mineral, Ca<sub>2</sub>(Al,Mn,Fe)<sub>3</sub>(OH)O(Si<sub>2</sub>O<sub>7</sub>)(SiO<sub>4</sub>) ; epidote group; less common than epidote; occurs in a variety of environments: low-grade regional metamorphic rocks, manganese deposits, and some intermediate to silicic volcanic rocks, perhaps due to metasomatism.
Industry:Mining
A monoclinic mineral, Ca<sub>2</sub>(Al,Mn,Fe)<sub>3</sub>(OH)O(Si<sub>2</sub>O<sub>7</sub>)(SiO<sub>4</sub>) ; epidote group; less common than epidote; occurs in a variety of environments: low-grade regional metamorphic rocks, manganese deposits, and some intermediate to silicic volcanic rocks, perhaps due to metasomatism.
Industry:Mining
A monoclinic mineral, Ca<sub>2</sub>(Al,Mn,Fe)<sub>3</sub>(OH)O(Si<sub>2</sub>O<sub>7</sub>)(SiO<sub>4</sub>) ; epidote group; less common than epidote; occurs in a variety of environments: low-grade regional metamorphic rocks, manganese deposits, and some intermediate to silicic volcanic rocks, perhaps due to metasomatism.
Industry:Mining
A monoclinic mineral, Ca<sub>2</sub>(Fe,Mg)<sub>3</sub>Al<sub>2</sub>(Si<sub>6</sub>Al<sub>2</sub>)O<sub>22</sub>(OH)<sub>2</sub>; amphibole group, with Mg/(Mg + Fe) = 0 to 0.49; forms a series with tschermackite; a fairly common constituent of eclogites and amphibolites.
Industry:Mining
A monoclinic mineral, Ca<sub>2</sub>(Fe<sub>2+</sub>,Mg)<sub>5</sub>Si<sub>8</sub>O<sub>22</sub>(OH)<sub>2</sub>; amphibole group; has Mg/(Mg+Fe<sub>2+</sub>) = 0 to 0.5; forms a series with tremolite and actinolite. Formerly called ferrotremolite.
Industry:Mining
