- 行业: 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 ...
Trade name for fused crystalline alumina or artificial corundum used as an quartz and beta quartz. b. Adj. Of or relating to one of two or more closely related minerals and specifying a particular physical structure (esp. a polymorphous modification); specif. said of a mineral that is stable at a temperature lower than those of its beta and gamma polymorphs (e.g., "alpha cristobalite" or "alpha -cristobalite," the low-temperature tetragonal phase of cristobalite). Some mineralogists reverse this convention, using alpha for the high-temperature phase (e.g., "alpha carnegieite," the isometric phase of carnegieite stable above 690 degrees C). c. In crystallography the angle between the b and c axes.
Industry:Mining
Trade name for green, often iridescent, artificial carbon silicide, CSi. Hexagonalrhombohedral plates. It is produced in an electric furnace and used as an abrasive and as a refractory material. Is useful for sharpening tools. Identical with moissanite.
Industry:Mining
Trade name for nonrotating wire rope of 18 by 4 over 3 by 24 construction.
Industry:Mining
Trade name for yellowish-red, apricot-colored quartz pebbles; may be of gem quality; near Cape May, NJ.
Industry:Mining
Trade name given by Kunz to artificially-colored blue zircon from Thailand.
Industry:Mining
Trade name of a rugged portable electronic device that measures ground distances precisely by determining the velocity of a phase-modulated, continuous, microwave radio signal transmitted between two instruments operating alternately as master station and remote station. It has a range up to 35 to 40 miles (56 to 64 km). Compare: geodimeter
Industry:Mining
Trade name of a single-shot borehole surveying instrument combining a compass and inclinometer, which is locked in place by the action of a preset time clock.
Industry:Mining
