Technical Paper, Issue 88U.S. Government Printing Office, 1915 - Mines and mineral resources |
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Common terms and phrases
abnormal ratios acetate acid ammonium acetate authors autunite Average U content average V₂O Berta Boltwood Bureau of Mines burette cent chem cold fusion Colo Colorado Complementary curies X 109 detachable ionization chamber determination of radium dissolving Eagle County Electronik emanating power emanation method filter filtrate fusion method fusion-and-solution method Gleditsch Heimann and Marckwald's high ratios HNO3 ignition method instrument investigation Jahrb Jahrg Jour leaching lead acetate lead vanadate leaf chamber leaf system Long Park low ratio Marckwald milligrams normal ratio Paradox Valley Physik Pirret pitchblende procedure Ra per gram Ra per gram×109 Ra/U radioactive radium and uranium radium content radium to uranium radium-uranium ratio Radiumgehalt von Pechblenden RATIO IN CARNOTITES ratio of radium samples of carnotite Sealed bulb Small sample Soddy solution method Standardization of electroscopes stopcock Superintendent of Documents TECHNICAL PAPER thorianite thorium total emanation turbing U₂O uranium in carnotite uranium minerals vanadium Ztschr
Popular passages
Page 9 - HNO3 and heat on a steam bath. Wh'en the solution is quiet, remove the cover and evaporate to dryness. Add 3 cc of HC1 and 5 cc of water to the residue and let it stand on the steam bath for a few minutes, stirring occasionally. Dilute with 25 cc of hot water, filter into a small beaker, and wash the...
Page 10 - PbSO4 with ammonia and add freshly prepared (NH4)HS until the solution is yellow and the uranium and what little lead is present are precipitated as sulphides. Warm the mixture on a steam bath until the sulphides settle well.
Page 16 - ... 6. Radium may be easily determined in one operation by the emanation method, either by solution or by ignition from tubes in which it has been sealed for one month to reach equilibrium. 7. In contrast with the success of the solution and the ignition methods for de-emanating carnotite, the method of fusion with sodium and potassium carbonates and the fusion-and-solution method both gave low results and were abandoned.
Page 9 - Na2CO2, adding 2 or 3 grams in excess. Boil the liquid for about 15 minutes until the yellowish uranium precipitate dissolves, leaving a brown precipitate which is principally iron.
Page 10 - OF ALUMINA. Nearly neutralize the filtrate with ammonia, have the solutions cool (not warmer than 30° C.), and add powdered carbonate of ammonia in about 2 grams excess to precipitate the aluminum. Let the precipitate settle, filter, and wash it with warm water. If the precipitate is bulky or is at all yellow, dissolve it in a little dilute H2SO4 and reprecipitate with carbonate of ammonia as described. Acidulate the filtrate from the alumina with H2SO4, and boil thoroughly to expel CO2.
Page 17 - BULLETIN 53. Mining and treatment of feldspar and kaolin in the southern Appalachian region, by AS Watts. 1913. 170 pp., 16 pis., 12 figs. BULLETIN 56.
Page 9 - HNOS for each 100 cc of liquid. Now add 10 cc of a 20 per cent lead acetate solution, and enough of a strong solution of ammonium acetate to neutralize the nitric acid present and substitute acetic acid for it. The object is to precipitate the vanadium as lead vanadate in an acetic acid solution. The ammonium acetate solution may be made by mixing 80 cc of strong ammonia, 100 cc of water, and...
Page 9 - Na^COj, and boil as before. Filter into the beaker containing the first filtrate. The iron precipitate may contain a little vanadium — reserve it for further treatment. Evaporate the united filtrates from the iron precipitation to a volume of about 200 cc, add 10 cc of strong HNO3 and boil until all CO2 is expelled.
Page 17 - TECHNICAL PAPER 41. The mining and treatment of lead and zinc ores in the Joplin district, Mo.; a preliminary report, by CA Wright.