- 업종: 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 hydrous ferrous ferric phosphate, Fe<sub>2+</sub>Fe<sub>3+ 2</sub>(PO<sub>4</sub>)<sub>2</sub>(OH)<sub>2</sub>; occurs as black grains from Brazil.
Industry:Mining
A hydrous ferrous ferric phosphate, Fe<sub>2+</sub>Fe<sub>3+ 2</sub>(PO<sub>4</sub>)<sub>2</sub>(OH)<sub>2</sub>; occurs as black grains from Brazil.
Industry:Mining
A hydrous ferrous oxalate, Fe<sub>2+</sub>C<sub>2</sub>O<sub>4</sub>2H<sub>2</sub>O , occurring in capillary or botryoidal forms and black shale.
Industry:Mining
A hydrous ferrous oxalate, Fe<sub>2+</sub>C<sub>2</sub>O<sub>4</sub>2H<sub>2</sub>O , occurring in capillary or botryoidal forms and black shale.
Industry:Mining
A hydrous ferrous oxalate, Fe<sub>2+</sub>C<sub>2</sub>O<sub>4</sub>2H<sub>2</sub>O , occurring in capillary or botryoidal forms and black shale.
Industry:Mining
A hydrous phosphate of calcium, sodium, and potassium; hexagonal; crystalline crusts and minute crystals; grayish- to greenish-white. The mineral from Dehrn, Nassau, Germany, is richer in sodium, conforming nearly to the formula 7CaO.Na<sub>2</sub>O.2P<sub>2</sub>O<sub>5</sub>.H<sub>2</sub>O , whereas the mineral found near Fairfield, UT is described as 14CaO.2(Na,K)<sub>2</sub>O.4P<sub>2</sub>O<sub>5</sub>3(H<sub>2</sub>O,CO<sub>2</sub>) .
Industry:Mining
A hydrous silicate of beryllium, Be<sub>3</sub>SiO<sub>4</sub>(OH)<sub>2</sub>.H<sub>2</sub>O , as an alteration product of epididymite.
Industry:Mining
A hygrometer held on a short length of cord and whirled around, the observer standing sideways to the air current. The wet bulb is thereby rapidly reduced to its final reading.
Industry:Mining
A hygrometer in which the two thermometers are mounted side by side on a brass frame and fitted with a loose handle so that it can be whirled in the atmosphere to be tested. The instrument is whirled at some 200 rpm for about 1 min and the readings on the wetand dry-bulb thermometers recorded; used in conjunction with Glaisher's or Marvin's hygrometrical tables. It gives more consistent and accurate results than the ordinary instrument.
Industry:Mining
