The Equation of State of Solids at Low Temperature (open access)

The Equation of State of Solids at Low Temperature

Technical report describing and evaluating the the three experimental methods for obtaining equation of state data at low temperatures; (1) approximate measurement of the PVT relationship by a piston-displacement technique, (2) the measurement of a heat capacity at constant volume as a function of molar volume and temperature, and (3) direct measurement of the pressure variation of the elastic constants using ultrasonic techniques. X-ray methods also might be applicable.
Date: October 13, 1961
Creator: Bernardes, N. (Newton), 1931- & Swenson, C. A.
System: The UNT Digital Library
Ternary Compounds Between Thorium Monocarbide and Thorium Dihydride (open access)

Ternary Compounds Between Thorium Monocarbide and Thorium Dihydride

From abstract: "The thorium-hydrogen-carbon system was studied by measuring hydrogen equilibrium pressures at various compositions and temperatures. Two compounds, ThC·ThH2 and ThC·2ThH2, were found and characterized. ThC·ThH2 has a hexagonal closest-packed lattice with ao=3.816Å and co=6.302Å. ThC·2ThH2 has a monoclinic lattice with ao=6.50Å, bo=3.80Å, co=10.91Å and β = 119°. The enthalpies of formation for each compound were determined."
Date: 1961
Creator: Peterson, D. T. & Rexer, J.
System: The UNT Digital Library
Small Order Shape Factor in Na22 (open access)

Small Order Shape Factor in Na22

From abstract: "The beta spectrum of Na22 has been examined using an intermediate-image beta-ray spectrometer operating at 2 1/2% transmission and 2.4% resolution. Five separate determinations of the maximum energy and of the slope of the form-factor plot were made. One determination was made using a charge-discriminating baffle inserted in the spectrometer. The unweighted mean of the five values for the maximum energy is 547.4 ± 1.0 kev. The unweighted mean of the five values for the form-factor slope is 0.023 ± 0.006 1/mc2."
Date: 1961
Creator: Nichols, R. T.; McAdams, R. E. & Jensen, E. N.
System: The UNT Digital Library
Structures of the Intermediate Phases Ni10Zr7 and Ni10Hf7 (open access)

Structures of the Intermediate Phases Ni10Zr7 and Ni10Hf7

This report discusses the experiments undertaken to determine the crystal structures of the intermediate phases Ni10Zr7 and Ni10Hf7. The report looks at structural determinations, a comparison observed and calculated structure factors for the refined zirconium-rich structure, the refined structural parameters for the stoichiometric Ni10Zr7 phase, a comparison of observed and calculated structure factors for the refined stoichiometric Ni10Zr7 structure, a comparison of observed intensity data and calculated structure factors for the stoichimetric Ni10Hf7 phase, and a comparison of interatomic distances in the zirconium-rich and stoichiometric Ni10Zr7 structures.
Date: 1961
Creator: Kirkpatrick, M. E.; Smith, J. F. & Larsen, W. L.
System: The UNT Digital Library
Chapter 48: Analytical Chemistry of Cobalt (open access)

Chapter 48: Analytical Chemistry of Cobalt

This report provides a detailed discussion of the analytical chemistry of cobalt, including an introduction, the properties of cobalt, the sampling of cobalt-bearing materials, the separation and isolation of cobalt, the detection and identification of cobalt, the determination of cobalt, and the specific methods for determining cobalt.
Date: 1961
Creator: Dale, John M. & Banks, Charles V.
System: The UNT Digital Library
Point Imperfections in Metals: Existance and Detection (open access)

Point Imperfections in Metals: Existance and Detection

From introductory paragraph: "The factors which control the properties, and hence the utility, of an alloy are microscopic in nature. These factors are controlled by controlling the composition and past history of the material. control of the composition of the alloy determines for the most part the number and types of phases which will be present, while control of the past history of the alloy determines the grain size and degree of crystalline perfection within the grains. Since the electrical, mechanical, and many of the physical properties of a metal are highly sensitive to the degree of crystalline perfection, it is worthwhile to explore the nature and role of crystalline imperfections."
Date: 1961
Creator: Smith, J. F.
System: The UNT Digital Library
Internal Conversion Coefficients of the 2+-0+, E2 Transitions in Even-Even Sm152[over]90 and Gd152[over]88 (open access)

Internal Conversion Coefficients of the 2+-0+, E2 Transitions in Even-Even Sm152[over]90 and Gd152[over]88

From abstract: "To investigate the deviation of the internal conversion coefficients of E2 transitions from theoretical computations and their dependence on nuclear deformation, the total internal conversion coefficient of the 121.8-kev 2+-0+ transition in ellipsoidal Sm152[over]90 was measured to be 1.135 ± 0.010 with a high accuracy coincidence-sum method. The K-shell to total internal conversion ratio was determined to be 0.588 ± 0.003 with a [beta] spectrometer...The experiment revealed no deviation from theory nor indications of strong dependence on nuclear deformation; it therefore did not confirm recent beliefs in this regard. The details of the coincidence-sum method were described. The K electron to total electron capture ratio, from Eu152 to the 1.53 Mev state in Sm152 was also measured to be 0.79±0.02."
Date: July 17, 1961
Creator: Lu, D. C. & Schupp, G.
System: The UNT Digital Library
gem-Bis(disubstitutedphosphinyl)alkanes. II. Extraction Properties of Bis(di-n-hexlphosphinyl)methane (open access)

gem-Bis(disubstitutedphosphinyl)alkanes. II. Extraction Properties of Bis(di-n-hexlphosphinyl)methane

From abstract: "Bis(di-n-hexylphosphinyl)methane, HDPM, [(C6H13)2P(O)]2CH2, has been studied as an extractant for a variety of metals. HDPM was evaluated as an extractant for uranium(VI) and compared with tri-n-octylphosphine oxide, TOPO, (C8H13)3PO. In nonpolar solvents, HDPM forms a polymeric-like substance with compounds of uranium(VI). Viscosity measurements indicate that the molecular weight of this polymeric-like substance is about 100 times greater than the corresponding complex with TOPO. Polymer formation occurs only when nonpolar solvents are used as diluents for HDPM and is easily avoided by using polar solvents such as 1,2-aichlorobenzene. HDPM forms 1:1 and 2:1 complexes with uranium(VI) nitrate. Equilibrium constants for these complexes as well as that for the 2:1 TOPO complex were calculated and it was shown that the over-all constant is at least ten times larger for the HDPM complex than for the TOPO complex. The effect of concentration of various mineral acids, extractant concentration, temperature, and diluents on the extraction of uranium are discussed."
Date: April 11, 1961
Creator: Burke, Keith E.; Sakurai, Hiroshi; O'Laughlin, Jerome W. & Banks, Charles V.
System: The UNT Digital Library
Electron Deficient Compounds: IX. The Structure of Stannous Chloride (open access)

Electron Deficient Compounds: IX. The Structure of Stannous Chloride

This report discusses the structure of stannous chloride along with tables and figures detailing findings.
Date: 1961
Creator: Rundle, R. E. & Olson, David, 1937-
System: The UNT Digital Library
Transport Reactions of Vanadium(III) Halides and Bromine (open access)

Transport Reactions of Vanadium(III) Halides and Bromine

From introduction: "...This investigation was originated to explore the possibility of vapor transport of VCl3 by chemical reaction. The reaction first considered was that of VCl3 and bromine which gave a rapid vapor transport of VCl3. Other work on solid solution formation in the system VCl3-VBr3 and transport of VBr3 in bromine developed thereafter."
Date: 1961
Creator: McCarley, Robert E.; Roddy, James W. & Berry, Keith O.
System: The UNT Digital Library
Pyrometallurgical Reprocessing of Thorium-Uranium Fuel (open access)

Pyrometallurgical Reprocessing of Thorium-Uranium Fuel

From summary: "A proposed metallurgical procedure for reporocessing Th-U233 fuel has been outlined. Some basic experimental data pertinent to the proposed process which has been published elsewhere has been reviewed and some new data presented. In the dissolution of thorium-uranium alloy in magnesium the data show that protactinium precipitates with the uranium and cerium remains in the magnesium-rich solution. It is expected that yttrium, other light rare earth elements, the alkali and alkaline earth metals will also concentrate in the magnesium-rich solution while iron, chromium, zirconium, molybdenum, niobium and the more noble metals will concentrate in the uranium-rich phase."
Date: 1961
Creator: Chiotti, P.; Woerner, P. F. & Parry, S. J. S.
System: The UNT Digital Library
A Model of a Mass Spectrometer to Simultaneously Collect Positive and Negative Ions (open access)

A Model of a Mass Spectrometer to Simultaneously Collect Positive and Negative Ions

From introductory paragraph: "A study of the ionization efficiency of the positive ions derived from chromyl fluoride and chromyl chloride as a function of the electron energy has been reported."
Date: 1961
Creator: Svec, Harry J. (Harry John), 1918- & Flesch, Gerald D.
System: The UNT Digital Library
Ion-Exchange Methods for Obtaining Pure Metals (open access)

Ion-Exchange Methods for Obtaining Pure Metals

This technical report details a process by which ion exchange was used for separation of rare earth metals in a highly pure form. Two techniques for resolving mixtures are described: ion-exchange elution chromatography and ion-exchange displacement chromatography.
Date: 1961
Creator: Powell, J. E. & Spedding, F. H. (Frank Harold), 1902-
System: The UNT Digital Library
Analysis of Mixtures of Alcohols by Acylation (open access)

Analysis of Mixtures of Alcohols by Acylation

From abstract: "Recently a general chemical method for the analysis of mixtures of alcohols appeared, using pyridine catalyzed acetylation and second order kinetics to determine the amount of the faster reacting component. The use of 0.25M isobutyric anhydride in pyridine containing 0.0025M perchloric acid as catalyst promotes the rate of the reaction and diminishes the time necessary to perform an analysis. A mathematical treatment of the data and kinetic plot reduces the number of kinetic points to only four or five. The mixtures are primarily composed of isomers."
Date: November 1961
Creator: Fellows, William Dean & Fritz, James S. (James Sherwood), 1924-
System: The UNT Digital Library