- 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 ...
A nuclear reactor in which the fission chain reaction is sustained primarily by thermal neutrons. Most reactors are thermal reactors.
Industry:Mining
A number facilitating statement of units of one system in corresponding values in another system.
Industry:Mining
A number n found by dividing the velocity of light in a vacuum c by the velocity of light in a transparent substance. Isometric crystals are isotropic and have one index of refraction; all other symmetries are anisotropic. Hexagonal, trigonal, and tetragonal crystals have two principal indices; orthorhombic, monoclinic, and triclinic crystals have three principal indices. Determination of indices of refraction of a mineral is a major means of mineral identification.
Industry:Mining
A number n found by dividing the velocity of light in a vacuum c by the velocity of light in a transparent substance. Isometric crystals are isotropic and have one index of refraction; all other symmetries are anisotropic. Hexagonal, trigonal, and tetragonal crystals have two principal indices; orthorhombic, monoclinic, and triclinic crystals have three principal indices. Determination of indices of refraction of a mineral is a major means of mineral identification.
Industry:Mining
A number n found by dividing the velocity of light in a vacuum c by the velocity of light in a transparent substance. Isometric crystals are isotropic and have one index of refraction; all other symmetries are anisotropic. Hexagonal, trigonal, and tetragonal crystals have two principal indices; orthorhombic, monoclinic, and triclinic crystals have three principal indices. Determination of indices of refraction of a mineral is a major means of mineral identification.
Industry:Mining
A number n found by dividing the velocity of light in a vacuum c by the velocity of light in a transparent substance. Isometric crystals are isotropic and have one index of refraction; all other symmetries are anisotropic. Hexagonal, trigonal, and tetragonal crystals have two principal indices; orthorhombic, monoclinic, and triclinic crystals have three principal indices. Determination of indices of refraction of a mineral is a major means of mineral identification.
Industry:Mining
A number of charges, in drill holes, fired simultaneously with an electric current.
Industry:Mining
A number of charges, in drill holes, fired simultaneously with an electric current.
Industry:Mining
A number of crystals grown together so that each crystal in the group is large enough to be seen by the unaided eye and each crystal is more or less perfect. In gemmology, it differs from a crystalline aggregate, as a homogenous gem stone can be cut only from an individual crystal of a crystal aggregate.
Industry:Mining
