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Cosmogenic Carbon-14 and Chlorine-36 in Meteorites
In 1947 Bauer, and later independently Huntley (1948), pointed out that the helium content of iron meteorites as measured by Paneth and coworkers could be accounted for by the accumulation through cosmic-ray production rather then the decay of uranium and thorium. Bauer (1947) also predicted that the meteroitic helium should contain a significant proportion of He3. I was realized that by studying the effects of cosmic radiation on meteorites much could be learned about the history of meteorite and cosmic radiation. Chemical and instrumental techniques have been developed for the isolation, purification, and measurement of cosmic-ray-induced C14 in both stone and iron meteorites. The isolation of carbon from the silicate materials is done by fusion in an oxidizing flux in a vacuum system. From the iron meteorites the carbon is recovered by the decomposition of the metal in nitric acid in a closed system.
Date:
June 4, 1962
Creator:
Goel, Parmatma S.
Object Type:
Report
System:
The UNT Digital Library
Geochemical and Geophysical Reconnaissance in Northern Peninsula Michigan and Northeastern Wisconsin
Discussing water samples collected during a reconnaissance study for uranium, and the analysis of the samples.
Date:
June 1962
Creator:
Kinnaman, R. L. & Illsley, C. T.
Object Type:
Report
System:
The UNT Digital Library
Reconnaissance for Uranium in the Lonquimay Area, Province of Malleco, Chile
Discussing a two-week reconnaissance of the Lonquimay area, in south-central Chile, in which anomalies were noted in marl and in a sulfide-mineralized shear zone in continental black shales
Date:
October 1962
Creator:
Knowles, Paul H.; Bowes, William A.; C., Mario Serrano & Moraga Brito, Aldo
Object Type:
Report
System:
The UNT Digital Library
Reconnaissance for Uranium in the Aisen Area, Province of Aisen, Chile
Discussing a general reconnaissance for uranium in the Aisen area of southern Chile.
Date:
October 1962
Creator:
Bowes, William A.; Knowles, Paul H.; Brito, Aldo Moraga & C., Mario Serrano
Object Type:
Report
System:
The UNT Digital Library
GAMLOG : a computer program for interpreting gamma-ray logs
Discussing a computer program, GAMLOG, used to interpret gamma-ray logs of uranium ores.
Date:
September 1962
Creator:
Scott, James H.
Object Type:
Report
System:
The UNT Digital Library
Reconnaissance for Uranium in the Colimapu Formation, Chile
Discussing Laboratory and field studies that show that the geologic history and environment of the Colimapu formation of central Chile differed considerably from those of the uranium-bearing Diamantiano formation of Argentina with which the Upper Colimapu has been correlated.
Date:
October 1962
Creator:
Bowes, William A.; Knowles, Paul H.; Brito, Aldo Moraga; H., Erik Klohn & C., Mario Serrano
Object Type:
Report
System:
The UNT Digital Library
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.
Object Type:
Report
System:
The UNT Digital Library
Cation Exchange in Acetone-Water-Hydrochloric Acid
Abstract: Distribution coefficients have been measured for the partition of metal ions between cation exchange resin and acetone-water-hydrochloric acid solutions. the differences in distribution coefficients of metal ions are greater in acetone-water media than in aqueous media of the same hydrochloric acid concentration. Using distribution coefficient data, conditions for column separations of mixtures can be selected. Column separations of metal ion mixtures can be effected by eluting with acetone-water-hydrochloric acid solutions of different compositions. Successful separations of a number of mixtures are reported.
Date:
May 10, 1962
Creator:
Fritz, James S. (James Sherwood), 1924- & Rettig, Thomas A.
Object Type:
Report
System:
The UNT Digital Library
Acid-Base Reactions and Kinetics of the Halates in Fused Nitrates
From Abstract : "The mechanism of the reactions of the halates, bromate, chlorate, and iodate, with dichromate in fused alkali nitrates has been shown to involve a fast equilibrium followed by a slow rate determining strip to give oxygen and halogen gases as final products." Experiments outlined serve as insight into the structure of fused salts or fused electrolytes.
Date:
November 1962
Creator:
Schlegel, James Max & Duke, P. R.
Object Type:
Report
System:
The UNT Digital Library
Propagation Characteristics of Capillary Ripples, III. Capillary Ripple Velocity and Attenuation Dispersion on Clean Water Surfaces and on Various Monolayers
From Abstract: "The theory and instrumentation previously described by us were applied to the systems monolayer-free distilled water; stearic acid, mixed hexadecanol and octadecanol and several long chain fatty ester monolayers; stearic acid - polyvinyl acetate mixed films and egg albumen spread films; heptanoic acid adsorbed monolayers."
Date:
January 1962
Creator:
Mann, J. Adiin, Jr. & Hansen, R. S.
Object Type:
Report
System:
The UNT Digital Library
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.
Object Type:
Report
System:
The UNT Digital Library
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.
Object Type:
Report
System:
The UNT Digital Library
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.
Object Type:
Report
System:
The UNT Digital Library
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.
Object Type:
Report
System:
The UNT Digital Library
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.
Object Type:
Report
System:
The UNT Digital Library
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.
Object Type:
Report
System:
The UNT Digital Library
The Preparation of TaBr4, TaI4 and Pyridine Adducts of the Tantalum(IV) Halides
Technical report. From Abstract : "The necessary conditions for preparation of TaBr4 and TaI4 by reduction of the pentahalides with tantalum or aluminum metal in a sealed tube under a controlled temperature gradient have been demonstrated."
Date:
September 5, 1962
Creator:
McCarley, R. E. & Boatman, J. C.
Object Type:
Report
System:
The UNT Digital Library
Calcium
Technical report outlining the element calcium as well as its occurrences, physical properties, chemical properties, methods of manufacture, economic aspects, and uses.
Date:
September 1962
Creator:
Carlson, O. N. & Haefling, J. A.
Object Type:
Report
System:
The UNT Digital Library
Boiling Points and Surface Tensions of Mixtures of Benzyl Acetate With Dioxan, Aniline and Meta-Cresol
Technical report. From Abstract : "Accurate measurements on boiling points and surface tensions of mixtures of benzyl acetate with dioxan, aniline and meta-cresol over the entire range of concentration are reported. The results have been analysed in terms of quasi-crystalline model which is partially successful in representing the composition dependence of heats of mixing, boiling points and surface tension except for composition dependence of boiling points of benzyl acetate and meta-cresol."
Date:
September 13, 1962
Creator:
Katti, P. K. & Chaudhri, M. M.
Object Type:
Report
System:
The UNT Digital Library
X-Ray Analytical Spectroscopy of the Rare Earths
Technical report. From Abstract : "The term 'rare earths' is the classic name given to the group of elements with atomic numbers 57 to 71. The element yttrium is usually included in this group. The chemical properties of these elements are so strikingly similar that they always occur together in nature and their separation from each other is a singularly difficult task. With but few exceptions, mixtures of these elements have also defied analysis by classical methods of analytical chemistry. Consequently for the analysis of ores, minerals, and mixtures obtained from fractionation processes, and for the assessment of the purity of isolated elements, it has been necessary to resort to measurements on physical properties. Of these properties, emission and absorption spectra of these elements have found the widest application."
Date:
September 1962
Creator:
Heidel, Robert H. & Fassel, Velmer A.
Object Type:
Report
System:
The UNT Digital Library
Magnetic Properties of Some Intra-Rare Earth Alloys
Technical report. From Abstract : "Paramagnetic susceptibilities of samarium structure alloys in the systems La-Gd, Nd-Y, Nd-Tm, and Ce-Y were measured from 4.2 - 300°K to determine what effect the formation of this structure has on the magnetic properties of the alloys. Susceptibility maxima were observed in the Nd-Y and Nd-Tm alloys, at 34.5 and 28.5°K, respectively. Slope changes were observed in the curve of 1/x versus T for the La-Gd alloy at 155 and 130°K, and the susceptibility of this alloy remained temperature-independent from 130-7°K. A rather poorly defined region of constant susceptibility was also observed or the Ce-Y alloy, from 26-37°K. Above these transition temperatures, the alloys obeyed the Curie-Weiss law, the susceptibilities of the La-Gd and Ce-Y samples indicating the possibility of electron transfer occurring in these cases."
Date:
September 10, 1962
Creator:
Roughan, P. E. & Deane, A. H.
Object Type:
Report
System:
The UNT Digital Library
III. Crystalline Complexes of Bis(Di-2-Ethylbutylphosphinyl) Methahe With Uranium(VI) Nitrate and With Thorium Nitrate
Technical report. From Abstract : "Bis(di-2-ethylbutylphosphinyl)methane, EBDPM, forms complexes with uranium (VI) nitrate and thorium (IV) nitrate in which EBDPM acts as a bidentate ligand and the nitrato groups appear to be coordinated. The complex with uranium (VI) is a monomer, UO2(NO3)29EBDPM), while the complex with thorium in a dimer, [Th(NO3)4]2(EBDPM)3. Both complexes are of high thermal stability."
Date:
October 16, 1962
Creator:
Parker, James R. & Banks, Charles V.
Object Type:
Report
System:
The UNT Digital Library
Separation and Spectrophotometric Determination of Rare Earths
Technical report. From Summary : "At the present time arsenazo appears to be widely used for the spectrophotometric determination of rare earths. Unfortunately, the method is not selective. The separation of rare earths and yttrium from interfering elements has been studied, and the following method has been proposed. Rare earths are precipitated as fluorides using fluorides using calcium fluoride as the carrier. Thorium and zirconium are removed by extraction with thenoyltrifluoroacetone (TTA) in xylene at pH 1.3. Small amounts of residual aluminum, iron, etc. are removed by extraction with 8-quinolinolchloroform at pH 4.5. Rare earths are separated from calcium by TTA extraction at the same pH, and they are then back-extracted into 1 M nitric acid. After evaporation of the solution, the rare earths are determined spectrophotometrically with arsenazo."
Date:
October 18, 1962
Creator:
Onishi, Hiroshi & Banks, Charles V.
Object Type:
Report
System:
The UNT Digital Library
The Enhancement of Acidity of Very Weak Acids in Tertiary Butyl Alcohol
Technical report. From Abstract : "The acidity of a solution of acid, HX, and salt, MX, is affected by both the concentration of X- and M+ owing to incomplete dissociation of the salt, MX. it was possible to increase the acidity of a solution of 2,6-di-tert-butylphenol - tetrabutylammonium 2,6-di-tert-butylphenolate relative to a dilute solution of tetrabutylammonium hydroxide by increasing the tetrabutylammonium bromide content. This indicates that the dissociation constant of the hydroxide base is sufficiently large that extensive dissociation occurs in dilute solutions. The addition of tetrabutylammonium bromide is therefore recommended as a general method for increasing the acidity and improving the titration characteristics of extremely weak acids."
Date:
October 22, 1962
Creator:
Marple, Leland & Fritz, J. S.
Object Type:
Report
System:
The UNT Digital Library