- Industri: Mining
- Number of terms: 33118
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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 crystal form from which other forms may be derived; e.g., a hexoctahedron has six faces replacing each octahedral face.
Industry:Mining
A crystal form of 24 faces in the isometric system with the gross appearance of each face of an octahedron being replaced by three faces arrayed around a diagonal triad. Each face of a trigonal trisoctahedron is an isosceles triangle, while each face of a tetragonal trisoctahedron is a trapezoid.
Industry:Mining
A crystal form of 24 faces in the isometric system with the gross appearance of each face of an octahedron being replaced by three faces arrayed around a diagonal triad. Each face of a trigonal trisoctahedron is an isosceles triangle, while each face of a tetragonal trisoctahedron is a trapezoid.
Industry:Mining
A crystal having two of the three axes inclined to the third and perpendicular to each other.
Industry:Mining
A crystal in an igneous rock that is foreign to the body of rock in which it occurs. Compare: xenolith.
Industry:Mining
A crystal of a mineral produced entirely by metamorphic processes. Adj: crystalloblastic.
Industry:Mining