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The anodic dissolution of gold in alkaline cyanide solutions has been studied by potentiostatic and galvanostatic techniques under high‐purity conditions. Measurements were made at room temperature and in the p H range 11–13, the concentration varying from 0.05 to 0.50%. The results show that gold has three current ma…
The experimental work leading to the development of Zircaloys -1, -2, -3, and -4 is reviewed. The corrosion properties of Zircaloys -2 and -4 in high temperature water and steam, and the effects of composition, heat treatment, and water chemistry upon oxide film formation and hydrogen absorption during corrosion are a…
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Among 22 compounds examined for photoluminescence, only , and the metaniobates of Mg Ca, Zn, and Cd show appreciable room temperature emission. With the exception of , all of these have the columbite structure; moreover, the only essentially nonluminescent columbite‐type compound noted was . The absorption edges of th…
Zone‐refined iron corrodes at the same rate whether cold‐worked or annealed. Cold‐working of iron containing 0.007–0.15% carbon increases the corrosion rate in 0.12 N HCl ( p H = 1.01 ) , the rate increasing still more after heat treating the iron at 77°–100°C for 2 hr. Cold‐working of iron containing 0.01–0.02% nitro…
The infrared spectra of solid crystalline films of ammonium nitrate were measured at temperatures ranging between the melting point (169 °C) and liquid air temperature (−190 °C). Four different spectra were obtained which are shown to belong to phase I, II, IV, and (very probably) VII. Phases III and V were not encoun…
Abstract Some experiments were carried out to prove the validity of the assumption of a simple series model for the calculation of the elastic modulus of crystalline regions in oriented linear polymers from X‐ray determination of lattice extension. Various specimens such as filaments, fibers, and films were prepared f…
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Eighty of the 150 or so grass species occurring in Britain have been subjected to controlled wet oxidation to facilitate the study of the opaline silica bodies in their silica cells proper, and in cells which are less consistently silicified. The various types of bodies are classified, figured, and described so as to…
The theory of ferrimagnetism accounts for the magnetic properties of the ferrites by strong antiferromagnetic A-B interactions and weak antiferromagnetic A-A and B-B interactions. It was recently discovered that the A-A interaction in Co3O 4 was much stronger than anticipated. To ascertain whether the anomalous strong…
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P. J. Anderson and P. L. Morgan, Trans. Faraday Soc., 1964, 60, 930 DOI: 10.1039/TF9646000930
When a leakage current flows over the wet polluted surface of an insulator, high-resistance dry bands form. Discharges across these dry bands usually become extinguished but, exceptionally, may develop into a flashover of the insulator. The formation of dry bands and the subsequent growth of discharges on the polluted…
La théorie dynamique classique de la diffraction des rayons X est étendue au cas des cristaux ayant subi une déformation quelconque et des ondes non planes. La méthode consiste à résoudre les équations de Maxwell en considérant les déformations et la courbure des ondes comme des perturbations du premier ordre. On obti…
When a leakage current flows over the wet polluted surface of an insulator, high-resistance dry bands form. Discharges across these dry bands usually become extinguished but, exceptionally, may develop into a flashover of the insulator. The formation of dry bands and the subsequent growth of discharges on the polluted…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTConfiguration of the Poly-(dimethylsiloxane) Chain. III. Correlation of Theory and ExperimentP. J. Flory, V. Crescenzi, and J. E. MarkCite this: J. Am. Chem. Soc. 1964, 86, 2, 146–152Publication Date (Print):January 1, 1964Publication History Published online1 May 2002Publis…
Single crystals have been examined by neutron diffraction in the range of temperatures 20 °C to 1 100 °C and of compositions UO2 to U4O9. The investigations divide into three groups, relating to UO2, UO2+x (where 0 < x < 0.25) and U4O9. UO2 has the fluorite structure at room temperature, with isotropic Debye-Waller fa…
Abstract Single crystals of NaCl were compressed at room temperature. The stress‐strain curve shows three well‐defined stages similar to those found for fcc. metals. The dislocation density, bulk density, and deformation characteristics were studied as functions of stress and strain. The recovery of the dislocation de…
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Molecular Orbital Treatment of the Bonding in Certain Metal Atom ClustersF. A. Cotton and T. E. HaasCite this: Inorg. Chem. 1964, 3, 1, 10–17Publication Date (Print):January 1, 1964Publication History Published online1 May 2002Published inissue 1 January 1964https://pubs.a…