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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…
Iron was anodically oxidized under both potentiostatic and galvanostatic conditions. It was found that the rate of film growth could be expressed by the over‐all equation where Q T is the film thickness, E the potential, and κ', β, and B are constants. A model is proposed based on a "place‐ exchange" mechanism in whic…
A neutron diffraction study of manganese telluride has been made using powder specimen. The specimen has been carefully checked by high temperature X-ray analysis and has been proved to be free from MnO and MnTe2 which are apt to contaminate the specimen. This investigation has shown that the magnetic structure of MnT…
Author explains in detail the kinetics of corrosion processes and gives a thorough study of their thermodynamical problems. He points out the factors which have influence on electrochemical corrosion. He investigates the role of cathodic inclusions concerning corrosion process in alloys and at the same time emphasizes…
Cobalt chromite, CoCr2O4, is a cubic spinel which is ferrimagnetic at low temperatures with a Curie point Tc ≈ 97 °K. The room temperature powder diffraction pattern on this material, corrected for temperature effects, shows that it is a normal spinel with an oxygen parameter equal to 0.38707 :f: .00005. At 4.2 °K the…
This review is mostly concerned with the structure of inorganic polycrystalline materials on a scale much larger than the atom, but dependent upon the behaviour of atoms as its units. Our interest is chiefly in the shape of crystals, but there are two basically different types. There are those, of almost any shape, wh…
Dislocation etch pit distributions and slip lines were studied on copper single crystals oriented for single glide and deformed in tension at 4·2°K. Slip lines on the cross slip plane were observed from the earliest stages of deformation and their character changed during the transition to stage II. The distribution o…