- 産業: 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 compound having the general formula, MAlO<sub>2</sub>or M<sub>3</sub>AlO<sub>3</sub>, in which M indicates a monovalent metal. Mineral aluminates, such as MgAl<sub>2</sub>O<sub>4</sub>, are termed spinels.
Industry:Mining
A compound in which a metal combines with organic compounds to form metalloorganic complexes, such as porphyrins and salts of various organic acids. Some metalloorganic compounds are soluble in water, others are not.
Industry:Mining
A compound microscope in which plane-polarized light impinges upon a polished specimen, commonly opaque, the light being reflected back to the objective through a second polarizer, where mineral color and polarization colors are observed in the ocular.
Industry:Mining
A compound microscope in which plane-polarized light impinges upon a polished specimen, commonly opaque, the light being reflected back to the objective through a second polarizer, where mineral color and polarization colors are observed in the ocular.
Industry:Mining
A compound of carbon and hydrogen that contains in its molecular structure a closed and saturated ring of carbon atoms; e.g., benzene, naphthalene, and anthracene.
Industry:Mining
A compound produced by fusing titanium dioxide with carbon or calcium carbide. Has a melting point in the range of 3,140 to 3,160 degrees C. This very hard, refractory material is used for wear-resistant applications and where good thermal shock resistance is needed, as in bearings, nozzles, and special refractories under either neutral or reducing conditions.
Industry:Mining
A compound that is a combination of phosphorus with a metal; e.g., schreibersite, (Fe,Ni)<sub>3</sub>P .
Industry:Mining
A compound, 3CaO.5Al<sub>2</sub>O<sub>3</sub>, formerly believed to be present in high-alumina hydraulic cement. It is now known that a melt of this composition consists of a mixture of CaO.2Al<sub>2</sub>O<sub>3</sub>and CaO.Al<sub>2</sub>O<sub>3</sub>, the latter compound being responsible for the hydraulic properties.
Industry:Mining
