- 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 ...
Sm<sub>2</sub>O<sub>3</sub>has a melting point of 2,350 degrees C. This material has a high thermal neutron cross section, making it usable as a nuclear control rod material. It is also used as a phosphor activator.
Industry:Mining
Small ceramic bar of specified composition that softens at certain temperatures.
Industry:Mining
Small chips or pieces of stone, usually marble or limestone, about 1/2 to 3/4 in (1.3 to 1.9 cm) in diameter, made by crushing and screening. Terrazzo chips are used with portland cement in making floors, which are smoothed down and polished after the cement has hardened.
Industry:Mining
Small crystal formed by the rapid freezing of molten metal when it comes into contact with the surface of a cold metal mold.
Industry:Mining
Small cut diamonds, usually about one-eighth carat. Generally refers to stones used in jewelry.
Industry:Mining
Small folds and faults that form in sediments shortly after they are deposited, in igneous rocks as they solidify, and in metamorphic rocks as they recrystallize.
Industry:Mining
Small fragments of any ore carried away from the ore bed by the action of water or by gravity alone, often leading to the discovery of mines;
Industry:Mining
