- 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, 2((Mg,Fe)<sub>5</sub>Al(Si<sub>3</sub>Al)<sub>4</sub>O<sub>10</sub>(OH)<sub>8</sub>; chlorite group; occurs in greenschists.
Industry:Mining
A monoclinic mineral, 2(AuTe<sub>2</sub>) ; brittle: commonly contains silver; sp gr, 9.35; an important source of gold.
Industry:Mining
A monoclinic mineral, 2(Ca<sub>2</sub>(Mg,Fe)<sub>5</sub>Si<sub>8</sub>O<sub>22</sub>(OH)<sub>2</sub>) in the hornblende series Mg/(Mg+Fe<sub>2+</sub>) = 0.5 to 0.89 of the amphibole group; forms a series with tremolite; 42 green, bladed, acicular, fibrous (byssolite asbestos), or massive (nephrite jade); prismatic cleavage; in low-grade metamorphic rocks.
Industry:Mining
A monoclinic mineral, 2(Ca<sub>2</sub>(Mg,Fe)<sub>5</sub>Si<sub>8</sub>O<sub>22</sub>(OH)<sub>2</sub>) in the hornblende series Mg/(Mg+Fe<sub>2+</sub>) = 0.5 to 0.89 of the amphibole group; forms a series with tremolite; 42 green, bladed, acicular, fibrous (byssolite asbestos), or massive (nephrite jade); prismatic cleavage; in low-grade metamorphic rocks.
Industry:Mining
A monoclinic mineral, 2(Ca<sub>2</sub>(Mg,Fe)<sub>5</sub>Si<sub>8</sub>O<sub>22</sub>(OH)<sub>2</sub>) in the hornblende series Mg/(Mg+Fe<sub>2+</sub>) = 0.5 to 0.89 of the amphibole group; forms a series with tremolite; 42 green, bladed, acicular, fibrous (byssolite asbestos), or massive (nephrite jade); prismatic cleavage; in low-grade metamorphic rocks.
Industry:Mining
A monoclinic mineral, 2(Ca<sub>2</sub>Mg<sub>5</sub>Si<sub>8</sub>O<sub>22</sub>(OH)<sub>2</sub>) ; amphibole group with magnesium replaced by iron, and silicon by aluminum toward actinolite; white to green; long-bladed or stout prismatic crystals; may show columnar, fibrous, or granular masses or compact aggregates; in low-grade metamorphic rocks such as dolomitic limestones and talc schists; the nephrite variety is the gemstone jade; the asbestiform variety is byssolite. Compare: actinolite
Industry:Mining
A monoclinic mineral, 2(Co<sub>3</sub>(AsO<sub>4</sub>)<sub>2</sub>.8H<sub>2</sub>O) ; forms a series with annbergite and with hoernesite; occurs in soft pink to crimson crystals, globular or reniform masses, or earthy encrustations as a weathering product of cobalt ores in the oxidized parts of nickelarsenic- silver-bearing veins; used as ore indicator for cobalt and possibly silver.
Industry:Mining
A monoclinic mineral, 2(Co<sub>3</sub>(AsO<sub>4</sub>)<sub>2</sub>.8H<sub>2</sub>O) ; forms a series with annbergite and with hoernesite; occurs in soft pink to crimson crystals, globular or reniform masses, or earthy encrustations as a weathering product of cobalt ores in the oxidized parts of nickelarsenic- silver-bearing veins; used as ore indicator for cobalt and possibly silver.
Industry:Mining
A monoclinic mineral, 2(Co<sub>3</sub>(AsO<sub>4</sub>)<sub>2</sub>.8H<sub>2</sub>O) ; forms a series with annbergite and with hoernesite; occurs in soft pink to crimson crystals, globular or reniform masses, or earthy encrustations as a weathering product of cobalt ores in the oxidized parts of nickelarsenic- silver-bearing veins; used as ore indicator for cobalt and possibly silver.
Industry:Mining
A monoclinic mineral, 2(Na<sub>2</sub>(Mg,Fe)<sub>3</sub>Al<sub>2</sub>Si<sub>8</sub>O<sub>22</sub>(OH)<sub>2</sub>) ; amphibole group with Mg/(Mg+Fe) = 0.5 to 1.0; prismatic cleavage; bluish-gray to lavender blue; common in low-temperature, high-pressure schists associated with lawsonite, pumpellyite, or epidote. Compare: crossite; riebeckite.
Industry:Mining
