- Industry: Mining
- Number of terms: 33118
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- 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 trigonal mineral, Na<sub>4</sub>(Ca,Ce)<sub>2</sub>(Fe,Mn,Y)ZrSi<sub>8</sub>O<sub>22</sub>(OH,Cl)<sub>2</sub>(?) ; weakly radioactive; in nepheline syenite and granite, commonly associated with arfvedsonite, sodalite, feldspar, aegirine, catapleiite, and astrophyllite. Compare: eucolite
Industry:Mining
A trigonal mineral, Na<sub>4</sub>(Ca,Ce)<sub>2</sub>(Fe,Mn,Y)ZrSi<sub>8</sub>O<sub>22</sub>(OH,Cl)<sub>2</sub>(?) ; weakly radioactive; in nepheline syenite and granite, commonly associated with arfvedsonite, sodalite, feldspar, aegirine, catapleiite, and astrophyllite. Compare: eucolite
Industry:Mining
A trigonal mineral, NaFe<sub>3+ 3</sub>(SO<sub>4</sub>)<sub>2</sub>(OH)<sub>6</sub>; alunite group; in earthy masses and minute scales; a common alteration product in pyrite-bearing deposits. Formerly called utahite.
Industry:Mining
A trigonal mineral, NaMg(Al,Fe)(C<sub>2</sub>O<sub>4</sub>).8H<sub>2</sub>O ; an oxalate occuring in green crystals that appear violet in artificial light; in veinlets in coal in the Chaitumusuk deposits, Siberia, Russia.
Industry:Mining
A trigonal mineral, NaNO<sub>3</sub>; rhombohedral cleavage; water soluble with a cooling taste; occurs only in very arid regions. Formerly called soda niter.
Industry:Mining
A trigonal mineral, Pb(Cu,Fe,Al)<sub>3</sub>(SO<sub>4</sub>)<sub>2</sub>(OH)<sub>6</sub>; canary yellow; in minute plates; in Beaver County, UT.
Industry:Mining
A trigonal mineral, Pb(Ti,Fe,Mn)<sub>21</sub>O<sub>38</sub>; crichtonite group; black; forms rounded crystals and grains in diamond-bearing sands.
Industry:Mining
A trigonal mineral, Pb<sub>2</sub>Mg<sub>2</sub>Si<sub>2</sub>O<sub>7</sub>(OH)<sub>2</sub>.
Industry:Mining
A trigonal mineral, Pb<sub>3</sub>FeSi<sub>4</sub>O<sub>12</sub>(Cl,OH) ; in yellow-green micaceous plates associated with another lead-iron silicate (melanotekite) in iron ore at Laangban, Sweden.
Industry:Mining
A trigonal mineral, Pb<sub>4</sub>(SO<sub>4</sub>)(CO<sub>3</sub>)<sub>2</sub>(OH)<sub>2</sub>; trimorphous with leadhillite and macphersonite; in the Susanna Mine, Leadhills, Scotland.
Industry:Mining
