- 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 ...
An orthorhombic mineral, (Fe,Al)<sub>25</sub>(PO<sub>4</sub>)<sub>17</sub>O<sub>6</sub>(OH)<sub>12</sub>.75H<sub>2</sub>O .
Industry:Mining
An orthorhombic mineral, (Fe,Mg)<sub>2</sub>Si<sub>2</sub>O 6 ; pyroxene group; now simply called ferrosilite. Compare: ferrosilite; clinoferrosilite.
Industry:Mining
An orthorhombic mineral, (Fe,Mg)<sub>2</sub>Si<sub>2</sub>O<sub>6</sub>; pyroxene group; dimorphous with clinoferrosilite; forms a series with enstatite. Symbol, Fs. Formerly called iron hypersthene; orthoferrosilite.
Industry:Mining
An orthorhombic mineral, (Fe,Mg)<sub>2</sub>Si<sub>2</sub>O<sub>6</sub>; pyroxene group; dimorphous with clinoferrosilite; forms a series with enstatite. Symbol, Fs. Formerly called iron hypersthene; orthoferrosilite.
Industry:Mining
An orthorhombic mineral, (Fe,Mg)Al<sub>2</sub>Si<sub>2</sub>O<sub>6</sub>(OH)<sub>4</sub>; forms series with carpholite and magnesiocarpholite; dark green; in quartz veins near Tomata, Celebes Island, Indonesia.
Industry:Mining
An orthorhombic mineral, (Fe,Mg,Mn)<sub>3</sub>B<sub>7</sub>O<sub>13</sub>Cl ; forms a series with boracite; dimorphous with congolite; Mohs hardness of 7 to 7-1/2; forms pseudocubes in haliteanhydrite deposits in the Harz Mountains, Germany.
Industry:Mining
An orthorhombic mineral, (Fe,Mn)Fe<sub>4</sub>(PO<sub>4</sub>)<sub>3</sub>(OH)<sub>5</sub>; forms a series with frondelite; dark green; named for Rockbridge County, VA.
Industry:Mining
An orthorhombic mineral, (K,Na)<sub>8</sub>Cu<sub>9</sub>(SO<sub>4</sub>)<sub>10</sub>(OH)<sub>6</sub>(?) ; emerald green; forms thin incrustations on lava and fumarole deposits on Mt. Vesuvius, Italy.
Industry:Mining
An orthorhombic mineral, (K,Na,Ba)<sub>3</sub>(Ti,Nb)<sub>2</sub>Si<sub>4</sub>O<sub>14</sub>; dark brown.
Industry:Mining
An orthorhombic mineral, (La,Ce)(Sr,Ca)Na<sub>2</sub>(Na,Mn)(Zn,Mg)Si<sub>6</sub>O<sub>17</sub>; forms pale brown crystals on the Kola Peninsula, Russia.
Industry:Mining
