- Industry: Mining
- Number of terms: 33118
- Number of blossaries: 0
- 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 ...
Chalcedony with dark, cloudy spots in a light-gray transparent base.
Industry:Mining
Change in concentration of an ion in a saturated solution through addition of another electrolyte that yields an ion in common with the solid substance present in excess. The ion product remains constant, but with the increase of concentration of one ion that of the other diminishes correspondingly. Since the solution is already saturated, precipitation occurs, the effect being a reversal of the process of ionization.
Industry:Mining
Change in magnetic moment of 1 g.atom on application of magnetic field of unit strength.
Industry:Mining
Change in which permanent alteration of properties occurs, accompanied by intake or release of energy. Reaction is governed by laws of mass conservation, definite and multiple proportions, equivalence, and volumetric reaction.
Industry:Mining
Changes in country rock produced by the intense heat and other properties of magma or lava in contact with them; it is a form of contact metamorphism in the usual sense. The term was originated by Fournet in 1867. Compare: endomorphism
Industry:Mining
Characteristic of a crystal showing three different colors in transmitted light; limited to crystallization in the orthorhombic, monoclinic, and triclinic systems. Compare: pleochroism; dichroism.
Industry:Mining
Characteristic of a crystal structure with bond strengths roughly equal in all directions.
Industry:Mining
Characteristic reactions of minerals to basic methods of mineral processing, studied in preliminary testwork on unknown ores.
Industry:Mining
Characterized by numerous very thin parallel layers, whether separable or not, either of sedimentary deposition (as a bed of clay) or of deposition from solution (as in a stalagmite or banded agate).
Industry:Mining
