- المجال: 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 building regularly used in whole or in part as a habitation for human beings, or any church, schoolhouse, railroad station, store, or other structure where people are accustomed to assemble, except any building or structure occupied in connection with the manufacture, transportation, storage, or use of explosive materials.
Industry:Mining
Any of the minerals native platinum, osmium, iridium, palladium, rhodium, ruthenium, and their alloys, such as osmiridium (Ir,Os) , ruthenosmiridium (Ir,Os,Ru) , rutheniridosmine (Os,Ir,Ru) , and platiniridium (Ir,Pt) . Other alloys of PGM are exemplified by stanopalliadinite, (Pd,Cu)<sub>3</sub>Sn<sub>2</sub> ; and potarite, PdHg . Other sources of PGM are sperrylite, PtAs<sub>2</sub>; cooperite, (Pt,Pd,Ni)S; stibiopalladinite, Pd<sub>5</sub>Sb<sub>2</sub>; braggite, (Pt,Pd,Ni)S ; vysotskite, (Pd,Ni)S ; ruthenarsenite, (Ru,Ni)As ; cuproiridsite; CuIr<sub>2</sub>S<sub>4</sub>; cuprorhodsit, CuRh<sub>2</sub>S<sub>4</sub>; malanite, Cu(Pt,Ir)<sub>2</sub>S<sub>4</sub>; and dayingite, CuCoPtS<sub>4</sub>. Varietal terms include plyxene and ferroplatinum for iron alloys and cuproplatinum for copper alloys.
Industry:Mining
3CaO.SiO<sub>2</sub>; dissociates at approx. 1,900 degrees C to form CaO and 2CaO.SiO<sub>2</sub>. This compound is the principal cementing constitutent of Portland cement, small quantities of MgO and Al<sub>2</sub>O<sub>3</sub>usually being present in solid solution. Tricalcium silicate is also present in stabilized dolomite refractories.
Industry:Mining
A "lamprophyre" composed of phenocrysts of green hornblende or clinopyroxene in a ground mass of sodic plagioclase, with accessory olivine, biotite, apatite, and opaque oxides. Named for Spessart, Germany.
Industry:Mining
A "lamprophyre" composed of phenocrysts of green hornblende or clinopyroxene in a ground mass of sodic plagioclase, with accessory olivine, biotite, apatite, and opaque oxides. Named for Spessart, Germany.
Industry:Mining
A (gaseous) pressure wave resulting from a direct wave striking an obstacle or an opposing surface and being reflected backwards.
Industry:Mining
A (gem) stone that has been artificially heated to change its color.
Industry:Mining
