- 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, Zn<sub>2</sub>(Fe,Mn)(PO<sub>4</sub>)<sub>2</sub>.4H<sub>2</sub>O ; forms tabular crystals with perfect cleavage; vitreous; colorless to pale blue-green; a secondary mineral from pegmatites; possibly in some oxidized base-metal deposits.
Industry:Mining
A monoclinic mineral, Zn<sub>3</sub>(AsO<sub>4</sub>)<sub>2</sub>.8H<sub>2</sub>O ; vivianite group; forms a series with parasymplesite; carmine-red with one perfect cleavage; occurs with smaltite at Schneeberg, Saxony, Germany. Also spelled koettigite.
Industry:Mining
A monoclinic mineral, Zn<sub>3</sub>Si<sub>4</sub>O<sub>10</sub>(OH)<sub>2</sub>.4H<sub>2</sub>O(?) ; smectite group; in Batystau, Kazakhstan.
Industry:Mining
A monoclinic mineral, ZrO<sub>2</sub>; may contain some hafnium, titanium, iron, and thorium.
Industry:Mining
A monoclinic mineral. PbAs<sub>2</sub>S<sub>4</sub>; metallic; dark gray; conchoidal fracture; in sugary dolomite of the Binnental at Lengenbach, Valais, Switzerland.
Industry:Mining
A monoclinic or triclinic mineral, (Fe,Mg,Mn)<sub>2</sub>Al<sub>4</sub>Si<sub>2</sub>O<sub>10</sub>(OH)<sub>4</sub>; dull green to grayblack; occurs in masses of brittle folia in metamorphosed argillaceous sedimentary rocks. It is related to the brittle micas.
Industry:Mining
A monoclinic or triclinic mineral, 4((K,Ba)Al(Si,Al)<sub>3</sub>O<sub>8</sub>) ; feldspar group, intermediate in the series orthoclase-celsian; prismatic cleavage; in manganese ore deposits, or veins and pegmatites.
Industry:Mining
A monoclinic or trigonal mineral, Fe<sub>2+ 2</sub>Fe<sub>3+</sub>(SiFe<sub>3+</sub>)O<sub>5</sub>(OH)<sub>4</sub>; kaolinite-serpentine group; in low-temperature hydrothermal veins.
Industry:Mining
