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Qualitative Observations of the Characteristics of TCl₅

Description: Summary: The controlled decomposition of the TCl₅ was carried out in an electric furnace at furnace temperatures varying from 114° to 550°C. The results indicate that chlorine evolution is noticeable when the TCl₅ temperature is about 75°C. The rate of reaction increases rapidly at a TCl₅ temperature of 175°C. Thus the possibility of TCl₅ existing at a very high temperature becomes uncertain. The TCl₄ prepared at the low temperatures (up to 300°) was obtained as a micro crystalline powder while those products allowed to heat at 400°-500° had a characteristic crystalline appearance.
Date: 1945
Creator: Gavlin, Gilbert; Hubbard, J. V. & Clewett, O. H.
Partner: UNT Libraries Government Documents Department

Uranium Hydride : A Survey

Description: The following report discusses the results of a survey that was initiated to ascertain the availability of uranium hydride in tonnage quantities.
Date: April 10, 1950
Creator: Kitzes, A. S.
Partner: UNT Libraries Government Documents Department

A Possible New Volatile Compound of Uranium

Description: A report discussing a possible new volatile compound of uranium, its probable properties, and attempts to synthesize it. Though the possible new compound was not successfully synthesized, the author provides suggestions for future work.
Date: July 1943
Creator: Lander, John Joseph
Partner: UNT Libraries Government Documents Department

Physico-chemical Studies of U-Compounds in Solution : Progress Report, February 1945

Description: This progress report discusses progress on oxidation-reduction studies, including polarography, as well as the Uranium-complex formation including electrical transport and spectro-photometric work. This report covers the work done in the period of February of 1945.
Date: May 26, 1948
Creator: Tishkoff, G. H. & Fanta, Paul E.
Partner: UNT Libraries Government Documents Department

X-ray Analysis of the Uranium-Carbon System

Description: The following report includes an account of the X-ray structures of all he uranium-carbides together with X-ray data on the solid solubilities of these carbides with each other and with uranium and carbon.
Date: 1948
Creator: Rundle, R. E.; Wilson, A. S. & Baenziger, Norman C.
Partner: UNT Libraries Government Documents Department

The X-ray Investigation of the Uranium Hydrogen System: The Structure of UH₃

Description: From abstract: "The uranium-hydrogen system has been examined by X-ray diffraction. This study has revealed one cubic hydride (UH3). Since the structure of the hydride is unrelated to the structures of any of the metal and the hydride has a definite composition, it is not an interstitial solid solution but a true compound."
Date: 1948
Creator: Rundle, R. E.; Wilson, A. S. & McDonald, R. A.
Partner: UNT Libraries Government Documents Department

The Preparation and Properties of Some Mixed Uranium Halides

Description: From abstract: "Compounds of tetravalent uranium containing two halogens have been prepared. Six combinations of the four halogens are possible, and at least one compound of each group was made. X-ray diffraction patterns were made in most cases and cooling curves of melts were made for the bromachlorides. The two general methods of preparation used were (a) reaction of a uranium trihalide with a halogen of greater atomic weight and (b) interaction of two tetrahalides."
Date: 1948
Creator: Warf, James C. & Baenziger, Norman C.
Partner: UNT Libraries Government Documents Department

Purification of Uranium Tetrachloride by Fractional Condensation

Description: "The effect of a single vacuum sublimation of contaminated uranium tetrachloride, with fractional condensation of the vapors, was investigated to determine whether a high degree of purity would result. It was found that this procedure was an excellent and simple method for obtaining exceedingly pure uranium tetrachloride."
Date: April 1, 1947
Creator: Young, H. S. & Susano, C. D.
Partner: UNT Libraries Government Documents Department

Denitration Loss of Ruthenium from Uranyl Nitrate Beta Mounts

Description: Abstract: "During the preparation of beta-gamma mounts of uranyl nitrate it is possible to affect a denitration loss of approximately 80% of the ruthenium. By adding hydroxylamine sulfate and sulfuric acid, the ruthenium is stabilized and the denitration loss is eliminated. The standard determination of ruthenium by calculation, utilizing a differential counting technique has been found to be approximately the same as the standard denitration of radiochemical assays."
Date: 1955
Creator: Mahlman, H. A. & Decker, C. W.
Partner: UNT Libraries Government Documents Department

Crystal Densities of Uranium Chlorides

Description: Abstract: "Using xylene as the densimetric solvent, the crystal densities have been determined by the pyknometric method for the following chlorides, UCl3, UCl4, UCl6(UCl4), UCl6 and U02Cl2."
Date: December 13, 1946
Creator: Sterett, C. C. & Calkins, V. P.
Partner: UNT Libraries Government Documents Department

A Microdetermination of Uranium by Ferric Sulfate Titration

Description: Abstract: "Following nitrate removal by means of a three-stage hydrochloric acid digestion, uranium was reduced with chromous sulfate reagent. In an inert atmosphere, the quadrivalent uranium was titrated at 80-95[degrees] with standard ferric sulfate solution. The end point was obtained with a potentiometric cell including a platinum in-titrant reference electrode and a platinum indicator electrode. Application was made to various low leverl uranium solutions. For samples containing 1 - 12 milligrams or uranium, less than one percent error may be expected. Iron and chromium do not interfere."
Date: February 16, 1949
Creator: Christopherson, E. W.
Partner: UNT Libraries Government Documents Department

Optimum Conditions for the "Hot Zone" Volatilization of TCl₄

Description: Abstract: "The data reported herein furnish a qualitative comparison of the rapidity of vaporization of TCl4 at various "hot zone" temperatures as well as a measure of the chlorine evolution attributed to its thermal decomposition. The presence of impurities in the TCl4 detracts from the significance of the reported chlorine evolution. The temperature recommended for rapid volatilization is 750 C at which TCl4 underwent thermal decomposition amounting to no more than 0.2% by weight."
Date: February 19, 1946
Creator: Crompton, C. E.; Calkins, V. P. & Larson, C. E.
Partner: UNT Libraries Government Documents Department

Colorimetric Determination of Molybdenum in TF₄

Description: The following report discusses a colorimetric method for molybdenum involving the reaction between a molybdate, thiocynate, and some reducing agent, usually SnCL2, that has been in use in the steel industry for some time.
Date: 1945
Creator: Wick, L. B.; Weaver, B. S. & Gates, J. W.
Partner: UNT Libraries Government Documents Department

Uranium Tetrachloride Two One-Year Inhalation Toxicity Studies of Animals at 0.2 and 0.05 mg U/m3

Description: The following report analyzes studies of chronic inhalation toxicity from uranium tetrachloride dust in animals who were exposed daily for a year for the purpose of determining "borderline" or safe levels of exposure for the duration of one year.
Date: 1948
Creator: Ashenburg, Norman J.; Rothermel, J. F.; Baxter, Robert; Eriksen, Nils; Cobler, John G.; Harrison, William N. et al.
Partner: UNT Libraries Government Documents Department