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United States Bureau of Mines
Industry: 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 ...
A monoclinic mineral, (Fe,Mg)<sub>7</sub>Si<sub>8</sub>O<sub>22</sub>(OH)<sub>2</sub>; amphibole group, with Mg/(Mg+Fe)&#61;0- 0.3 ; forms series with cummingtonite and with magnesiocummingtonite; fibrous or needlelike, commonly in radial aggregates; characteristic of iron formations in the Lake Superior and Labrador Trough regions. Also spelled gruenerite.
Industry:Mining
A monoclinic mineral, (Fe,Mg)<sub>7</sub>Si<sub>8</sub>O<sub>22</sub>(OH)<sub>2</sub>; amphibole group; has Mg/(Mg + Fe<sub>2+</sub>) &#61; 0.30 to 0.69 ; prismatic cleavage; may be asbestiform; in amphibolites and dacites; fibrous varieties (amosite, magnesium rich, and montasite, iron rich) are used as asbestos.
Industry:Mining
A monoclinic mineral, (Fe,Mg)Al<sub>2</sub>(PO<sub>4</sub>)<sub>2</sub>(OH)<sub>2</sub>; lazulite group; forms a series with lazulite; light blue.
Industry:Mining
A monoclinic mineral, (Fe,Mg,Mn)<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub>.4H<sub>2</sub>O ; green; in small tabular crystals at Truro, Cornwall, U.K.
Industry:Mining
A monoclinic mineral, (Fe,Mg,Mn)<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub>.4H<sub>2</sub>O ; green; in small tabular crystals at Truro, Cornwall, U.K.
Industry:Mining
A monoclinic mineral, (Fe,Mg,Ni)(Cr,Al)<sub>2</sub>(SO<sub>4</sub>)<sub>4</sub>.22H<sub>2</sub>O ; halotrichite group; forms reddish-purple fibrous masses.
Industry:Mining
A monoclinic mineral, (Fe,Mn)<sub>2</sub>(PO<sub>4</sub>)(OH) ; forms a series with triploidite; dimorphous with satterlyite.
Industry:Mining
A monoclinic mineral, (Fe,Mn)<sub>2</sub>(PO<sub>4</sub>)F; forms a series with triplite; clove-brown.
Industry:Mining
A monoclinic mineral, (Fe,Mn)WO<sub>4</sub>; within the huebnerite-ferberite series; pseudoorthorhombic due to twinning.
Industry:Mining
A monoclinic mineral, (Fe,Ti)<sub>7</sub>SbO<sub>13</sub>(OH) ; forms minute prismatic crystals or twins.
Industry:Mining