- 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 ...
A hexagonal and trigonal mineral, native carbon 4(C) , polymorphous with chaoite, diamond, and lonsdaleite; scaly, soft, lustrous, metallic; greasy feel; as crystals, flakes, scales, laminae, or grains in veins or bedded masses or disseminations in carbonaceous metamorphic rocks; conducts electricity well, is soft and unctuous; immune to most acids; extremely refractory.
Industry:Mining
A hexagonal and trigonal mineral, native carbon 4(C) , polymorphous with chaoite, diamond, and lonsdaleite; scaly, soft, lustrous, metallic; greasy feel; as crystals, flakes, scales, laminae, or grains in veins or bedded masses or disseminations in carbonaceous metamorphic rocks; conducts electricity well, is soft and unctuous; immune to most acids; extremely refractory.
Industry:Mining
A hexagonal and trigonal mineral, native carbon 4(C) , polymorphous with chaoite, diamond, and lonsdaleite; scaly, soft, lustrous, metallic; greasy feel; as crystals, flakes, scales, laminae, or grains in veins or bedded masses or disseminations in carbonaceous metamorphic rocks; conducts electricity well, is soft and unctuous; immune to most acids; extremely refractory.
Industry:Mining
A hexagonal barrel revolving on a horizontal axis, containing perforated die plates and screens. Pulverizing is done by steel balls inside the barrel.
Industry:Mining
A hexagonal mineral (epsilon-MnO<sub>2</sub>), trimorphous with pyrolusite and ramsdellite. See: pyrolusite.
Industry:Mining
A hexagonal mineral, (Ca,Mn)<sub>14</sub>Si<sub>24</sub>O<sub>58</sub>(OH)<sub>8</sub>.2H<sub>2</sub>O ; in spherical aggregates of white scales; at Benkulen, Sumatra.
Industry:Mining
A hexagonal mineral, (Ca,Sr)<sub>5</sub>(AsO<sub>4</sub>,PO<sub>4</sub>)<sub>3</sub>(OH) ; apatite group; in veinlets in manganese ore at Sitipar, Chindwara district, India.
Industry:Mining
A hexagonal mineral, (Ca,Th,Ce)(PO<sub>4</sub>).H<sub>2</sub>O ; rhabdophane group.
Industry:Mining
A hexagonal mineral, (Ce,La)F<sub>3</sub>; further speciated on the basis of the dominant rareearth element; weakly radioactive; in pegmatites associated with gadolinite, allanite, and bastnaesite in the Front Ranges, CO.
Industry:Mining
