- 行业: Mining
- Number of terms: 33118
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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, (Ba,H<sub>2</sub>O)Mn<sub>5</sub>O<sub>10</sub>; rare as single crystals; commonly intergrown with other manganese oxides. Formerly called psilomelane, a term now reserved for mixtures. Compare: hollandite
Industry:Mining
A monoclinic mineral, (Ba,K)<sub>1-2</sub>(Si,Al)<sub>8</sub>O<sub>16</sub>.6H<sub>2</sub>O ; zeolite group; in hydrothermal veins, vugs in igneous rocks, manganese ores, saline lakes.
Industry:Mining
A monoclinic mineral, (Ba,K)<sub>1-2</sub>(Si,Al)<sub>8</sub>O<sub>16</sub>.6H<sub>2</sub>O ; zeolite group; in hydrothermal veins, vugs in igneous rocks, manganese ores, saline lakes.
Industry:Mining
A monoclinic mineral, (Ba<sub>2</sub>(Fe,Mn)(VO<sub>4</sub>)<sub>2</sub>(OH) ; brackebuschite group; forms prismatic crystals and aggregates of needles with diaspore, ephesite, and bixbyite in manganese ore at Gamagara ridge, Postmasburg, Republic of South Africa.
Industry:Mining
A monoclinic mineral, (Ca,Ce,Th)(P,Si)O<sub>4</sub>; monazite group; an intermediate member of a crystal-solution series between CePO<sub>4</sub>(monazite) and CaTh(PO<sub>4</sub>)<sub>2</sub>(a synthetic compound).
Industry:Mining
A monoclinic mineral, (Ca,Na)(Ca,Mg,Fe)Si<sub>2</sub>O<sub>6</sub>, in the range 20% augite to 20% aegirine end members of the pyroxene group. Formerly called acmite-augite, aegirineaugite.
Industry:Mining
A monoclinic mineral, (Ca,Na<sub>2</sub>,K<sub>2</sub>)<sub>2</sub>Si<sub>4</sub>O<sub>10</sub>.3H<sub>2</sub>O ; zeolitelike; white; fibrous.
Industry:Mining
A monoclinic mineral, (Ca,Na<sub>2</sub>,K<sub>2</sub>)<sub>5</sub>Al<sub>10</sub>Si<sub>38</sub>O<sub>96</sub>.25H<sub>2</sub>O ; zeolite group; in a pegmatite at San Piero, Elba, Italy.
Industry:Mining
A monoclinic mineral, (Ca/2,Na)<sub>0.3</sub>(Mg,Fe)<sub>3</sub>(Si,Al)<sub>4</sub>O<sub>10</sub>(OH)<sub>2</sub>.4H<sub>2</sub>O ; smectite group; soft; massive; plastic; unctuous; in veins and cavities in serpentinite and basalt. Etymol: Greek "sapon" soap
Industry:Mining
A monoclinic mineral, (Ca/2,Na)<sub>0.3</sub>(Mg,Fe)<sub>3</sub>(Si,Al)<sub>4</sub>O<sub>10</sub>(OH)<sub>2</sub>.4H<sub>2</sub>O ; smectite group; soft; massive; plastic; unctuous; in veins and cavities in serpentinite and basalt. Etymol: Greek "sapon" soap
Industry:Mining
