Niobium-Tin-Aluminum Alloy Studies (open access)

Niobium-Tin-Aluminum Alloy Studies

From Abstract : "A proposed constitutional diagram was developed from equilibrium data obtained for the niobium-tin binary alloy system. ... Alloying Nb3Sn with Nb3Al appears to raise the zero field superconducting transformation temperature of Nb3Sn slightly."
Date: February 1963
Creator: Ellis, Thomas Gordon & Wilhelm, Harley A.
System: The UNT Digital Library
Least Structure Solution of Photonuclear Yield Functions (open access)

Least Structure Solution of Photonuclear Yield Functions

From Abstract : "A new method for the solution of experimental photonuclear yield functions for cross sections is presented. ... The resulting cross sections are compared to the assumed cross sections used to derive the trial yield function."
Date: 1963
Creator: Cook, B. C.
System: The UNT Digital Library
Spectrophotometric Determination of Scandium with Arsenazo (open access)

Spectrophotometric Determination of Scandium with Arsenazo

From Introduction : "After a study on the determination of rare earths with arsenazo, it was thought worthwhile to attempt a spectrophotometric determination of scandium with the same reagent."
Date: 1963
Creator: Onishi, Hiroshi & Banks, Charles V.
System: The UNT Digital Library
Crystalline Field Splittings in Holmium and Dysprosium Ethylsulfates (open access)

Crystalline Field Splittings in Holmium and Dysprosium Ethylsulfates

From report : "It has become apparent that pragmatic resonance data alone are insufficient to correctly evaluate crystal field parameters for rare-earth ethylsulfates, and that heat capacity data above 20°K are a useful aid in determining whether low lying levels obtained by absorption spectroscopy have been correctly identified."
Date: March 1963
Creator: Spedding, F. H.; Gerstein, B. C.; Haas, W. J.; Phillips, E. & Sutherland, W. L.
System: The UNT Digital Library
Magnetostriction in Dy and Ho (open access)

Magnetostriction in Dy and Ho

From Abstract : "Phenomenal magnetostriction has been observed in Dy and Ho single crystals. ... [The} magnetostriction curve showed three slightly developed knees which agree well with the knees observed in the magnetization data for Ho previously reported."
Date: 1963
Creator: Legvold, S.; Alstad, J. & Rhyne, J.
System: The UNT Digital Library
The Inference of Adsorption from Differential Double Layer Capacitance Measurements (open access)

The Inference of Adsorption from Differential Double Layer Capacitance Measurements

From Abstract : "Dependence of boundary tension and capacitance at the mercury-aqueous 0.1 N HClO4 interface on polarization and organic solute concentration were determined for the colutes n-amyl alcohol and phenol. ... An earlier treatment proposed by this Laboratory based on a (non-thermodynamic) assumption of linear variation of surface charge density with coverage appears adequately justified for inference of fractional surface coverages near the electrocapillary maximum, but must be considered approximate for evaluation of molar area at full coverage in cases where linear variation of charge with coverage has not been demonstrated."
Date: April 26, 1963
Creator: Hansen, Robert S.; Kelsh, Dennis J. & Grantham, D. H.
System: The UNT Digital Library
Mass Spectrometric Evidence for the Pyridoxal-Leucine Reaction Mechanism (open access)

Mass Spectrometric Evidence for the Pyridoxal-Leucine Reaction Mechanism

From Abstract : "The mass spectrum of leucine-dn, prepared by the reaction of pyridoxal with excess leucine in D2O medium, has been established using the crucible source techniques. ... The reaction can be used for the selective α, β-deuteration of amino acids other than leucine.
Date: May 3, 1963
Creator: Junk, G. A. & Svec, H. J.
System: The UNT Digital Library
Reinvestigation of the CC Stretching and CH3 Rocking Assignments In Isopropyl and tert-Butyl Halides (open access)

Reinvestigation of the CC Stretching and CH3 Rocking Assignments In Isopropyl and tert-Butyl Halides

From report: "In a series of paper (1-3) Sheppard has analyzed the vibrational spectra of simple alkyl halides. During the course of an investigation of the spectra of similar alkyl thiocyanates certain anomalies appeared in the assignments of the CC stretching and methyl rocking vibrations in isopropyl and tert.-butyl halides."
Date: May 3, 1963
Creator: Hirschmann, R. P. & Kniseley, R. N.
System: The UNT Digital Library
Isotopic Composition of Vanadium From Organic Sources (open access)

Isotopic Composition of Vanadium From Organic Sources

From Abstract : "The V50/V51 ratios of vanadium from the ascidians, Ciona intestinalis and Ascidia ceratodes were measured, on an absolute basis, by comparison with a reference using a CEC Model 21-220 180° mass spectrometer."
Date: 1963
Creator: Calellen, Jennings; Flesch, Gerald D. & Svec, Harry J.
System: The UNT Digital Library
Tricarbalyllic Acid (Propane-1, 2, 3-Tricarboxylic Acid) (open access)

Tricarbalyllic Acid (Propane-1, 2, 3-Tricarboxylic Acid)

From report : "Tricarbalyllic acid (propane-1, 2, 3-tricarboxylic acid) has a structure similar to that of citric acid, except that it lacks the hydroxyl group attached to the middle of the carbon atom. Properties of the rare earth citrates have been used very successfully in the separation of rare earths by ion exchange methods; consequently it was deemed advisable to study the rare-earth compounds which form with the anion if triarbalyllic acid."
Date: 1964
Creator: Gupta, A. K. & Powell, J. E.
System: The UNT Digital Library
Thermal Conductivity of Silicon and Iron From 300 to 1400°K (open access)

Thermal Conductivity of Silicon and Iron From 300 to 1400°K

From Abstract : "The thermal diffusivities of pure silicon and of Armco iron have been measures from 300 to 1400°K. The specific heats of the same materials have been measured over the same temperature range."
Date: January 1, 1963
Creator: Klein, A. H.; Shanks, H. R. & Danielson, G. C.
System: The UNT Digital Library
Rare Earth Intermetallic Comounds (open access)

Rare Earth Intermetallic Comounds

From Abstract : "Some of the important properties of the rare earth intermetallic and semimetallic compounds are reviewed. ... A compilation of the crystal structures of these compounds is appended to this review."
Date: 1964
Creator: McMasters, O. D. & Gschneidner, K. A., Jr.
System: The UNT Digital Library
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
The Uranium-Rhenium Alloy System (open access)

The Uranium-Rhenium Alloy System

Abstract The phase diagram of the uranium-rhenium alloy system is presented along with a discussion on transformation kinetics of the uranium solid solutions. The phase diagram is of the double eutectic type with the intermediate phase having the composition URe2. This phase exhibits allotropy at 180°C and melts congruently at 2200°C. URe2 reacts sluggishly with the uranium solid solutions below 750°C to form the peritectoid compound U2Re. Eutectic reactions occur at 1105° and 2105°C at respective compositions of 10.5 and 65.5 wt. % Re. Eutectoid reactions occur at 643° and 681°C at compositions of 1.4 and 6 wt. % Re, respectively. The maximum solubility of rhenium in α uranium is about 0.4 wt. % at 643°C and in β uranium is 1.9 wt. % at 681°C. The solubility of rhenium in γ uranium is 6 wt. % at 681°C and increases to about 7 wt. % at 975°C. The solubility of uranium in rhenium is 0.6 wt. % at room temperature with little variation up to 2000°C. Alloys of β and γ uranium containing more than about 1.2 and 7 wt. % Re respectively, can be readily supercooled to room temperature. Rapid cooling of γ alloys containing less than about …
Date: January 14, 1963
Creator: Jackson, R. J. (Robert James), 1929-; Williams, D. E. & Larsen, W. L.
System: The UNT Digital Library
Flame Spectra of Vanadium, Niobium, Rhenium, Titanium and Molybdenum (open access)

Flame Spectra of Vanadium, Niobium, Rhenium, Titanium and Molybdenum

Abstract Line spectra of vanadium, niobium, titanium, molybdenum and rhenium of sufficient intensity to allow detection at the 1–10 p.p.m. level can be excited in fuel-rich, oxy-acetylene flames. For the strongest lines of tungsten, the sensitivity of detection is 90 p.p.m. Weak lines of zirconium, hafnium, osmium, tantalum and uranium are also observed in these flames. Recordings of the spectra are given along with wavelength tables of the strongest lines.
Date: July 23, 1962
Creator: Fassel, Velmer A.; Myers, Robert B. & Kniseley, Richard N.
System: The UNT Digital Library
Thermodynamics of Formation of ThMg2 (open access)

Thermodynamics of Formation of ThMg2

Literature review on the discovery, experiments on, and applications of the compound ThMg2.
Date: January 1963
Creator: Novotny, D. B. & Smith, J. F.
System: The UNT Digital Library
The Solubility of Holmium in Copper, Silver, and Gold (open access)

The Solubility of Holmium in Copper, Silver, and Gold

From Abstract: "The solid solubility of holmium in copper, silver, and gold was determined using metallographic techniques. The composition of the first intermetallic compound in these systems was found to be Cu4Ho, Ag7Ho2, and Au3Ho. These compounds form eutectics with the solvent metals which melt at 868, 787, and 778°C respectively."
Date: January 1963
Creator: Wunderlin, W. J.; Beaudry, B. J. & Daane, A. H.
System: The UNT Digital Library
Transport Reactions of Some Vanadium (III) Halides (open access)

Transport Reactions of Some Vanadium (III) Halides

Technical report. From Abstract : "The reactions of VCl2. VCl3, and VCl3-VBr3 mixtures with bromine vapor at 350 to 450°C led to vaporization of the halides and deposition of mixed halides of vanadium (III) at lower temperatures."
Date: August 21, 1962
Creator: McCarley, Robert E.; Roddy, James W. & Berry, Keith O.
System: The UNT Digital Library
The Thallium-Indium Phase Diagram as a Function of Composition, Temperature, and Pressure (open access)

The Thallium-Indium Phase Diagram as a Function of Composition, Temperature, and Pressure

Technical report. From Abstract : "The thallium-rich region of the thallium-indium phase diagram was determined from atmospheric pressure to 5.5 kbars primary from electrical resistivity data obtained as a function of composition, temperature, and pressure."
Date: August 21, 1962
Creator: Meyerhoff, Robert Wagner & Smith, J. F.
System: The UNT Digital Library
Phase Diagram and Thermodynamic Properties of the Yttrium-Zinc System (open access)

Phase Diagram and Thermodynamic Properties of the Yttrium-Zinc System

Technical report. From Abstract : "Thermal, metallographic, and vapor pressure data were obtained to establish the phase boundaries and the standard free energy, enthalpy, and entropy of formation for the compounds in the yttrium-zinc system."
Date: July 27, 1962
Creator: Chiotti, P. & Mason, J. T.
System: The UNT Digital Library
Magnetization and Electrical Resistivity Terbium Single Crystals (open access)

Magnetization and Electrical Resistivity Terbium Single Crystals

Technical report. From Abstract : "Magnetic moment measurements have been made on single crystals of terbium (hcp) with fields of 50 to 18,000 oe applied along the <1120> (a-axis), <1010> (b-axis), and <0001> (c-axis) directions. The temperature range covered was 1.4 to 500°K."
Date: August 23, 1962
Creator: Hegland, D. E.; Legvold, S. & Spedding, F. H.
System: The UNT Digital Library
Propagation Characteristics of Capillary Ripples II. Instrumentation for Measurement of Ripple Velocity and Amplitude (open access)

Propagation Characteristics of Capillary Ripples II. Instrumentation for Measurement of Ripple Velocity and Amplitude

Technical report. From Abstract : "An instrument for measuring the propagation velocity of capillary ripples to within 0.3% and for measuring the amplitude of such ripples to within 1 to 10% (depending upon amplitude) was designed and constructed. The principle components of the instrument were a Teflon Langmuir trough (with provision for automatic recording of compression data); generating and receiving probes consisting of a thin rod and a razor blade respectively mounted so that the rod and razor edge were parallel and accurately placed in the surface to be studied."
Date: January 1963
Creator: Mann, J. Adin, Jr. & Hansen, R. S.
System: The UNT Digital Library
Rare Earth Metal - Metal Halide Systems, Lanthanum, Cerium, and Praseodymium Bromides (open access)

Rare Earth Metal - Metal Halide Systems, Lanthanum, Cerium, and Praseodymium Bromides

Technical report. From Abstract : "The MBr3 + M phase diagrams for lanthanum, cerium, and praseodymium are presented. Lanthanum and cerium exhibit simple solutions of metal, with 14 and 12 mole % dissolved at eutectic temperatures of 728 and 687°, respectively. The compound PrBr2.38 is found, melting incongruently to a solution of 16% Pr in PRBr3 and Pr(s) at 601°. For praseodymium the cryoscopic behavior of dilute solutions of metal is consistent with the primary formation of the Pr2+ solute. But with lanthanum and cerium the results are anomalous, as the cryoscopic analyses indicate 1.6-1.7 and 2.0 new particles (cation basis) per metal dissolved instead of ~3."
Date: September 4, 1962
Creator: Sallach, Robert A. & Corbett, John D.
System: The UNT Digital Library
I. Niobium(IV) Bromide and Pyridine Adducts of the Niobium(IV) Halides (open access)

I. Niobium(IV) Bromide and Pyridine Adducts of the Niobium(IV) Halides

Technical report. From Abstract : "Reaction of NbBr5 and niobium metal in a sealed tube under a temperature gradient from 410° to 350° gave NbBr4 in good yields. However, an increase in the higher temperature from 410° to 450° was sufficient to eliminate NbBr4 as a product and cause deposition of a lower bromide."
Date: September 5, 1962
Creator: McCarley, Robert E. & Torp, Bruce A.
System: The UNT Digital Library