Materials Literature
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Optical absorption and emission spectra of trivalent ytterbium in various chelates are reported. The experimental energy levels of Yb3+ are compared with predictions of electrostatic crystal-field theory and of a contact model of ligand-field theory. Good agreement is found between theory and experiment for the electr…
Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans the biological, physical, and social sciences.
Abstract For structures with hexagonal symmetry, three different axial systems (rhombohedral, orthorhombic, and hexagonal) are in general use to define the indices of directions and planes. The hexagonal axial system is the one in which confusion is most likely to occur if the axes and the notation are not clearly def…
Results of BET adsorption measurements on a‐c and d‐c sulfuric acid anodic films on aluminum have been compared with results of pore counts and with coating ratio figures. Both real surface and volume were measured. A roughness factor should be introduced in order to obtain an agreement between data from different sou…
A technique has been developed to measure the 60c/s a.c. intrinsic electric strength of organic polymers. This technique consists in embedding the electrodes and film to be measured in a thermoset resin. The solid construction eliminates prebreakdown discharges on the film surface from the breakdown of liquid used in…
N. S. Anderson and D. A. Rees, J. Chem. Soc., 1965, 5880 DOI: 10.1039/JR9650005880
A singular-perturbation expansion of the electric field and the concentrations provides a rigorous justification for dividing an electrolytic solution into ' the diffuse part of the double layer at an interfac~ and a diffusion layer on the solution side of the interface. At the same time this expansion provides a mean…
Important applications in data storage, pulse-field measurement, wave propagation and the study of magnetic crystals are likely to be found for a recently reported class of materials. These magnetoelectric materials, as they are called, become magnetised in an electric field and electrically polarised in a magnetic fi…
Abstract The permeabilities, diffusivities and solubilities of He, Ne, A, O 2 , N 2 , Kr, CO 2 , H 2 S, and H 2 O in poly(ethyl methacrylate) have been measured above and below the glass temperature. Water showed a small increase in solubility when the polymer was heated above the glass temperature. Water also showed…
D. J. Greenland, R. H. Laby and J. P. Quirk, Trans. Faraday Soc., 1965, 61, 2013 DOI: 10.1039/TF9656102013
Abstract The thermal expansion of wood constituents has been measured dilatometrically both in the dry and the water‐swollen state. Dry measure meats were made with mercury as the confining liquid on samples pressed into dense pellets at elevated temperatures and pressures. Between −30 and 30°C, the thermal expansion…
Numerous tests have shown that Alloy 600, a 76 nickel-15 chromium-7 iron alloy, has excellent corrosion resistance in pressurized high temperature water. The present tests were undertaken to determine the influence of possible contaminants in 600 F (316 C) pressurized water on corrosion behavior, using both single and…
Abstract A model is proposed to explain the formation of slip lines in irradiated copper crystals during the propagation of the Lüders front. In this model it is shown that, due to the sweeping up of the irradiation produced defect clusters by deformation, the critical stress to produce a slip line is that required to…
J. D. Russell, Trans. Faraday Soc., 1965, 61, 2284 DOI: 10.1039/TF9656102284
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRare Earth Metal-Metal Halide Systems. VII. The Phases Gadolinium 1.6-Chloride and Gadolinium DiiodideJack E. Mee and John D. CorbettCite this: Inorg. Chem. 1965, 4, 1, 88–93Publication Date (Print):January 1, 1965Publication History Published online1 May 2002Published iniss…
A detailed study has been made of the phases produced and their geometric distribution during formation of Edison‐type tubular positive nickel electrodes. The initial charging in lithiated electrolytes converts the to a beta phase having a solid solution range for di‐ and tetravalent nickel. The beta crystalline struc…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInfrared Studies of Ligand-Ligand Interaction in Dihalogenodiammineplatinum(II) ComplexesKazuo Nakamoto, Paul J. McCarthy, Junnosuke Fujita, Robert A. Condrate, and George T. BehnkeCite this: Inorg. Chem. 1965, 4, 1, 36–43Publication Date (Print):January 1, 1965Publication H…
The object of this paper is to find out why the calculated rare-earth crystal-field parameters do not agree with those determined experimentally. As is well known, in explaining the 4f spectra in the rare-earth compounds, one needs relatively few crystal-field constants, Vnm's. These Vnm's have been measured for many…
Abstract Solution and diffusion of He, Ne, Ar, Kr, Xe, H 2 , N 2 , O 2 , and n ‐C 4 H 10 have been studied in filled dimethylpolysiloxane elastomers, at temperatures between 0 and −37°C. for all penetrants, and down to −78°C. for some. Crystallization of the rubber, commencing at about −50°C. resulted in large decreas…
The electronic energy levels determined from absorption spectra of U4+ in crystals containing UCl62— complexes are identified as to irreducible representation and the resulting set of levels used to determine the least-squares best values of Slater Fk integrals, spin—orbit ζ5f, and fourth- and sixth-degree crystalline…