- 行业: Mining
- Number of terms: 33118
- Number of blossaries: 0
- 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 ...
An orthorhombic mineral, (Mg,Fe)<sub>5</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) = 0.1-0.89; forms series with magnesiogedrite and ferrogedrite; common in schists, gneisses, and metasomatic rocks.
Industry:Mining
An orthorhombic mineral, (Mg,Fe,Mn)(Nb,Ta)<sub>2</sub>O<sub>6</sub>. Compare: columbite
Industry:Mining
An orthorhombic mineral, (Mg,Ti,Fe,Al)<sub>2</sub>(BO<sub>3</sub>)O ; forms dull, brownish-black prismatic crystals having perfect cleavage.
Industry:Mining
An orthorhombic mineral, (Mn,Mg)<sub>2</sub>(Ce,La,Nd)(AsO<sub>4</sub>)(OH)<sub>4</sub>; speciated on the basis of predominance of cerium, lanthanum, or neodymium; in dolomite cavities in Sweden.
Industry:Mining
An orthorhombic mineral, (Mn,Mg)<sub>6</sub>Zn<sub>3</sub>(AsO<sub>4</sub>)<sub>2</sub>(SiO<sub>4</sub>)(OH)<sub>8</sub>; in zinc deposits at Franklin, NJ.
Industry:Mining
An orthorhombic mineral, (Mn,Mg)<sub>9</sub>Fe<sub>3</sub>(PO<sub>4</sub>)<sub>8</sub>(OH)<sub>3</sub>.9H<sub>2</sub>O .
Industry:Mining
An orthorhombic mineral, (Na,Ca,Sr)<sub>3</sub>(Mn,Fe)<sub>2</sub>Mn<sub>2</sub>(VO<sub>4</sub>)<sub>4</sub>(OH,O)<sub>5</sub>.2H<sub>2</sub>O ; forms black needles on limestone in New Mexico.
Industry:Mining
An orthorhombic mineral, (Na,K)<sub>10</sub>Ca<sub>5</sub>Al<sub>6</sub>Si<sub>32</sub>O<sub>80</sub>(Cl<sub>2</sub>,F<sub>2</sub>,SO<sub>4</sub>)<sub>3</sub>.18H<sub>2</sub>O ; forms in laths in a melilite nephelinite lava at Mt. Shaheru, Kivu Province, Congo.
Industry:Mining
An orthorhombic mineral, (NH<sub>4</sub>)<sub>2</sub>C<sub>2</sub>O<sub>4</sub>.H<sub>2</sub>O ; transparent; yellowish-white; forms lamellar and pulverent masses in guano.
Industry:Mining
An orthorhombic mineral, (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub>; occurs around fumaroles and in guano deposits.
Industry:Mining