- Sektör: Mining
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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 former name for rhabdophane, a hexagonal mineral, (Ce,La,Nd)PO<sub>4</sub>.H<sub>2</sub>O ; speciated on the basis of predominance of cerium, lanthanum, or neodymium; Also spelled rhabdophanite.
Industry:Mining
A former name for rhodochrosite, a trigonal mineral, MnCO<sub>3</sub>; calcite group, with Mn replaced by Fe toward siderite, Ca toward calcite, Mg, Zn, Co, and Cd; rhombohedral cleavage; in hydrothermal veins, residual manganese deposits, and pegmatites; a minor source of manganese.
Industry:Mining
A former name for samarskite, a monoclinic mineral, (Y,Ce,U,Fe)<sub>3</sub>(Nb,Ta,Ti)<sub>5</sub>O<sub>16</sub>; commonly metamict; in granite pegmatites.
Industry:Mining
A former name for spodumene, a monoclinic mineral, LiAlSi<sub>2</sub>O<sub>6</sub>; pyroxene group; prismatic cleavage; in granite pegmatites in crystals up to scores of meters long (called logs); a source of lithium; may be of gem quality (lavender kunzite, green hiddenite).
Industry:Mining
A former name for stilbite, a monoclinic and triclinic mineral, Na<sub>2</sub>Ca<sub>4</sub>(Al<sub>10</sub>Si<sub>26</sub>O<sub>72</sub>).34H<sub>2</sub>O ; zeolite group, with K replacing Na; forms sheaflike crystal aggregates and radiated masses in cavities in igneous rocks, as an alteration of plagioclase, or in hydrothermal veins.
Industry:Mining
A former name for tetradymite, a trigonal mineral, Bi<sub>2</sub>Te<sub>2</sub>S ; forms foliated masses in auriferous veins, commonly with tellurobismuthite; a source of bismuth.
Industry:Mining
A former name for tetrahedrite, an isometric mineral, (Cu,Fe)<sub>12</sub>Sb<sub>4</sub>S<sub>13</sub>, having copper replaced by zinc, lead, mercury, cobalt, nickel, or silver; forms a series with tennantite and freibergite; metallic; crystallizes in tetrahedra; occurs in hydrothermal veins and contact metamorphic deposits; a source of copper and other metals.
Industry:Mining
A former name for tyrolite, an orthorhombic mineral, Ca<sub>2</sub>Cu<sub>9</sub>(AsO<sub>4</sub>)<sub>4</sub>(OH)<sub>10</sub>.10H<sub>2</sub>O ; forms green crystal aggregates having foliated micaceous structure.
Industry:Mining
