scheelite sentence in Hindi
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- Due to the scarcity of natural gem-quality scheelite, synthetic scheelite is much more likely to simulate it than diamond.
- Due to the scarcity of natural gem-quality scheelite, synthetic scheelite is much more likely to simulate it than diamond.
- KIO 4 forms tetragonal crystals of the Scheelite type ( space group " I " 4 1 / a ).
- Cassiterite, platinum, scheelite, allanite, and native bismuth have been recovered along with gold from placer mines in the district.
- There is a high concentration of Scheelite in Northeast of Brazil, mainly in the Currais Novos mine in Rio Grande do Norte State.
- These hot fluids contained gold, silver, antimony and sulfur which, as the waters cooled, left behind minerals like pyrite, stibnite and scheelite.
- Regarding tungsten, in 1781 Carl Wilhelm Scheele discovered that a new acid, tungstic acid, could be made from scheelite ( at the time named tungsten ).
- In 1781, Carl Wilhelm Scheele discovered that a new acid, tungstic acid, could be made from Cronstedt's scheelite ( at the time named tungsten ).
- After the family moved to King Island, Tasmania in 1966, Pellicci attended the local high school while John and Arthur took jobs at the King Island Scheelite mine.
- The district is particularly famous for its amount of scheelite crystals, but the mines have also made $ 29 million off of lead, silver, zinc, tungsten, and copper.
- Huttonite was first described in 1950 from beach sand and fluvio-glacial deposits in type location, where it is accompanied by scheelite, cassiterite, zircon, uranothorite, ilmenite and gold.
- Scheelite's refractive index ( 1.918 1.937 uniaxial positive, with a maximum birefringence of 0.016 ) and dispersion ( 0.026 ) are both moderately high.
- The mineral has tetragonal crystal symmetry and the same structure as scheelite ( calcium tungstate, CaWO 4 ), but can be metamict ( amorphous ) due to radiation damage from its small content of thorium.
- The Falcon Continuous ( C ) centrifugal concentrator is primarily used for the separation of heavy minerals which occur in ore concentrations above 0.1 % by weight, such as cassiterite, tantalum and scheelite.
- When present together in solid solution, energy is transferred from the higher-energy tungsten to the lower-energy molybdenum, such that fairly low levels of molybdenum are sufficient to cause a yellow emission for scheelite, instead of blue.
- Gold mining throughout the United States came to a halt, but Independence Mine was permitted to continue to operate because of the presence of scheelite, an ore of the " strategic mineral " tungsten, which occurs in the quartz lode with the gold.
- The Falcon Ultra-Fine ( UF ) centrifugal concentrator is primarily used for the separation of heavy minerals which occur in ore concentrations above 0.1 % by weight, such as cassiterite, tantalum and scheelite when the majority of the particles are smaller than 75 �m.
- NH 4 ReO 4 can be regarded as the prototype structure of a family of ammonium scheelites, which include the pertechnetate ( NH 4 TcO 4 ), periodate ( NH 4 IO 4 ), tetrachlorothallate ( NH 4 TlCl 4 ) and tetrachloroindate ( NH 4 InCl 4 ).
- The visible absorption spectrum of scheelite, as seen by a hand-held ( direct vision ) spectroscope, may also be of use : Most natural stones show a number of faint absorption lines in the yellow region of the spectrum ( ~ 585 nm ) due to praseodymium and neodymium trace impurities.
- This was accomplished either in the presence of short wave ( 2540 ?) fluorescent light, where the dull white fluorescence distinguishes it from scheelite ( fluoresces blue ) and zircon ( fluoresces yellow ), or by first boiling the impure sample in hydrochloric acid to induce an oxide surface on scheelite and permitting handpicking under visible light.
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