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Investigation of Uranium Polymorphs

Description: The UO3-water system is complex and has not been fully characterized, even though these species are common throughout the nuclear fuel cycle. As an example, most production schemes for UO3 result in a mixture of up to six or more different polymorphic phases, and small differences in these conditions will affect phase genesis that ultimately result in measureable changes to the end product. As a result, this feature of the UO3-water system may be useful as a means for determining process history. This research effort attempts to better characterize the UO3-water system with a variety of optical techniques for the purpose of developing some predictive capability for estimating process history in polymorphic phases of unknown origin. Three commercially relevant preparation methods for the production of UO3 were explored. Previously unreported low temperature routes to β- and γ-UO3 were discovered. Raman and fluorescence spectroscopic libraries were established for pure and mixed polymorphic forms of UO3 in addition to the common hydrolysis products of UO3. An advantage of the sensitivity of optical fluorescence microscopy over XRD has been demonstrated. Preliminary aging studies of the α and γ forms of UO3 have been conducted. In addition, development of a 3-D phase field model used to predict phase genesis of the system was initiated. Thermodynamic and structural constants that will feed the model have been gathered from the literature for most of the UO3 polymorphic phases.
Date: August 1, 2011
Creator: Sweet, Lucas E.; Henager, Charles H.; Hu, Shenyang Y.; Johnson, Timothy J.; Meier, David E.; Peper, Shane M. et al.
Partner: UNT Libraries Government Documents Department
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Origin of Uranium Deposits

Description: Report discussing uranium deposits and their origins. Sections include information regarding geochemistry of uranium, occurrence of uraniferous deposits, uraniferous igneous rocks, uranium in vein deposits, sandstone-type deposits, uraniferous coal and associated carbonaceous shale, and uraniferous marine sedimentary rocks.
Date: March 1955
Creator: McKelvey, V. E.; Everhart, D. L. & Garrels, R. M.
Partner: UNT Libraries Government Documents Department
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Ames Project, Chemical Research - Analytical Chemistry, Report for Period of February 1 to March 10, 1944

Description: Technical report covering (1) analysis of uranium bromide and chloride samples, (2) the ferric-nitrate method of analyzing uranium fluorides for fluorine, (3) spectrographic determination of boron, cadmium and manganese in magnesium metal, (4) service analyses. contributions to other problems, (5) attempted preparation of uranous oxyfluoride, and (6) corrections in previous reports.
Date: April 13, 1944
Creator: Spedding, F. H. (Frank Harold), 1902- & Wilholm, H. A.
Partner: UNT Libraries Government Documents Department
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Airborne Gamma-Ray Spectrometer and Magnetometer Survey, Final Report. Volume 2: Kingman Quadrangle (Arizona, California, Nevada)

Description: The following report is the second volume in a series of reports documenting airborne gamma-ray spectrometer and magnetometer survey results. The data on this report focuses on the Kingman quadrangle.
Date: February 1979
Creator: Aero Service (Firm)
Location: None
Partner: UNT Libraries Government Documents Department
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Airborne Gamma-Ray Spectrometer and Magnetometer Survey, Final Report. Volume 2: Las Vegas Quadrangle (Arizona, California, Nevada)

Description: The following report is the second volume in a series of reports documenting airborne gamma-ray spectrometer and magnetometer survey results. The data on this report focuses on the Las Vegas quadrangle.
Date: February 1979
Creator: Aero Service (Firm)
Location: None
Partner: UNT Libraries Government Documents Department
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Identification of Slag Constituents from Uranium Metal Production Bombs

Description: Abstract: "X-ray and microscopic examination of slags from uranium metal production bombs which gave good and bad yields in the plant at St. Louis have indicated the significance of uranium oxide formation. Apparently the oxide (UO2) results from reaction of the UF4 with linear material, particularly with moisture in the liner."
Date: January 31, 1952
Creator: Vaughan, D. A.; Cocks, G. G. & Schwartz, C. M.
Partner: UNT Libraries Government Documents Department
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CONSTITUTION OF LOW CARBON U-C ALLOYS

Description: (((Abstract unscannable)))<><DSN>13:014503<ABS>Thc Nb-O equilibrium system was determined by metallographic examination of arc-cast alloys made ot electron-gun-refined Nb metal and special purity Nb/sub 2/O/sub 5/. Two intermediate oxides. NbO and NbO/sub 2/, melt without decomposition at 1945 C and 1915 C, respectively. Eutectic reactions exist between Nb and NbO at 1915 C and between NbO and NbO/sub 2/ at 1810 C . Experimental evidence supports a peritectic reaction between NbO/sub 2/ and Nb/sub 2/O/sub 5/ at 1510 C. The maxinium solid solubility of 0 in Nb metal is 0.72 wt.%. (auth)
Date: February 1, 1959
Creator: Blumenthal, B.
Partner: UNT Libraries Government Documents Department
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Diffusion in Uranium, Its Alloys, and Compounds

Description: ABS>A review of laboratory diffusion studies on uranium and its compounds and alloys is presented. Included are results and analysis of studies on diffusion in single-phase and in multiphase U alloys, diffusion of gases in U, and diffusion in UO/sub 2/. (J.R.D.)
Date: May 1, 1961
Creator: Rothman, S. J.
Partner: UNT Libraries Government Documents Department
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National Uranium Resource Evaluation: Ashton Quadrangle, Idaho, Montana, and Wyoming

Description: From Abstract: "The Ashton Quadrangle, Idaho, Montana, and Wyoming, was evaluated to identify and delineate areas containing environments favorable for uranium deposits, using criteria developed for the National Uranium Resource Evaluation program. Aerial radiometric data were evaluated, and anomalies were examined in the field. Fourteen uranium occurrences were noted in the study area."
Date: unknown
Creator: Suekawa, Harry S.; Merrick, D.; Clayton, J. & Rumba, S.
Location: None
Partner: UNT Libraries Government Documents Department
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Annihilation of Nuclei by Displacement Spikes

Description: At an Octcber, 1957 meeting between USAEC, AECL, and Bettis personnel, the theoretical aspects of the radiation effects on the gamma red and alpha + gamma /sub 2/ transformation in U-Nb alloys were discussed. A theoretical model is presented which involves the annihilation of nuclei of the new phase by the action of displacement spikes. (W.D.M.)
Date: November 1, 1957
Creator: Thomas, D. E.
Partner: UNT Libraries Government Documents Department
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Airborne Gamma-Ray Spectrometer and Magnetometer Survey, Las Vegas Quadrangle (Arizona, California, Nevada), Williams Quadrangle (Arizona), Prescott Quadrangle (Arizona), and Kingman Quadrangle (Arizona, California, Nevada): Final Report, Volume 1

Description: This is an airborne reconnaissance report on several quadrangles in Arizona, California, and Nevada.
Date: February 1979
Creator: Western Geophysical Company of America. Aero Service Division.
Partner: UNT Libraries Government Documents Department
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Uranium Hydrogeochemical and Stream Sediment Reconnaissance Data Release for the Ashton NTMS Quadrangle, Idaho/Montana/Wyoming, Including Concentrations of Forty-Two Additional Elements

Description: From summary: This report contains data collected during a geochemical survey for uranium in the Ashton National Topographic Map Series (NTMS) quadrangle of eastern Idaho, southwestern Montana, and northwestern Wyoming (Fig. 1) by the Los Alamos Scientific Laboratory (LASL) as part of the nationwide lydrogeochemical and Stream Sediment Reconnaissance (HSSR).
Date: August 1980
Creator: Shannon, Spencer S., Jr.
Partner: UNT Libraries Government Documents Department

National Uranium Resource Evaluation: Wells Quadrangle, Nevada, Idaho and Utah, Appendix A-E

Description: Appendices containing data on uranium availability in the Wells Quadrangle to accompany a report on U.S. uranium resources in Nevada, Idaho, Utah.
Date: August 1982
Creator: Proffitt, Jerry L.; Mayerson, David L.; Parker, David P.; Wolverson, Nancy; Antrim, Don; Berg, John et al.
Location: None
Partner: UNT Libraries Government Documents Department
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