222. The infrared spectra of some tetrahedral inorganic complex halides
R. J. H. Clark and T. M. Dunn, J. Chem. Soc., 1963, 1198 DOI: 10.1039/JR9630001198
Materials Literature
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Electrochemical Oxidation of Titanium Surfaces
Films produced on titanium depend on the nature and concentration of electrolyte, forming voltage, current density, and temperature. In most cases, dense films of limited thickness are produced, but in some cases, thick, porous films result. Physical, chemical, and electrical nature of the coatings are discussed toget…
Neutron and X-Ray Diffraction Studies of Nonstoichiometric Metal Hydrides
The zirconium-deuterium system in addition to α-Zr consists of three deuteride phases: γ, δ, and ε. Each phase exists over a wide range of compositions. The γ phase is tetragonal. The δ phase is cubic (CaF 2 -type). The ε phase is tetragonal. Its lattice constants vary with composition as it approaches stoichiometry o…
Thermochemical properties of phosphorus compounds
S. B. Hartley, W. S. Holmes, J. K. Jacques, M. F. Mole and J. C. McCoubrey, Q. Rev. Chem. Soc., 1963, 17, 204 DOI: 10.1039/QR9631700204
Stresses in Anodic Films
Abstract not Available.
Die elementarfibrillen der cellulose
Abstract Die Bakteriencellulose von Acetobacter xylinum besteht wie die Cellulose der pflanzlichen Primärwände aus Elementarfibrillen, die mit 35 Å Durchmesser (Fig. 1, 2) nurmehr etwa 36 Kettenmoleküle enthalten (Fig. 3). Diese verhalten sich wie spröde Kristallnadeln, woraus auf ein homogenes Kettengitter geschlosse…
Specific Heat of Atactic and Isotactic Polypropylene and the Entropy of the Glass
The specific heat of atactic and isotactic polypropylene has been measured from 80° to 490°K. The isotactic sample was 64.9% crystalline, as determined by specific volume, and the atactic sample was 2–3% crystalline, as determined by the specific heat measurements. Below the glass temperature, which was found to be 25…
The Influence of Coagulation Variables on the Structure and Physical Properties of an Acrylic Fiber
During the coagulation step in the wet spinning process, a concentrated, highly viscous polymer solution is transformed into protofibers which require further processing before they acquire textile fiber properties. The structure of these protofibers is strongly influenced by coagulation conditions, and this structure…
Electrical Conduction Anomaly in Samarium‐Doped Barium Titanate
Studies of both single crystals and ceramics of samarium‐doped BaTiO 3 having identical compositions show that the positive temperature coefficient (PTC) electrical resistivity anomaly originates at the grain boundaries of the ceramic. The grain‐boundary region is visualized as an electron exhaustion layer, 10 2 to 10…
488. The thermal decomposition of oxalates. Part II. Thermogravimetric analysis of various oxalates in air and in nitrogen
D. Dollimore, D. L. Griffiths and D. Nicholson, J. Chem. Soc., 1963, 2617 DOI: 10.1039/JR9630002617
The Synthesis and Stability of Anthophyllite
The pure magnesium orthorhombic amphibole, anthophyllite, has been synthesized and its upper and lower stability limits have been established by reversible hydrothermal experiments. The synthetic mineral has refractive indices nx=1·587±0·001, ny=1·602±0·005, nz=1·613±0·001, and unit-cell dimensions of a0=18·61±0·02 Å,…
Crystalline and Paracrystalline Order in High Polymers
The mathematical treatment of light scattering by regular and random arrays of points is outlined. The diffraction patterns of two-dimensional models are compared with patterns from ideal crystals, imperfect crystals, and paracrystalline lattices. The effects of various types of crystalline imperfections and paracryst…
Diffusion of Oxygen in Vitreous Silica
The diffusivity of the oxygen ion in vitreous silica has been directly determined by exchange measurements employing the stable isotope 18 O and mass spectrometer analysis. It was found that over the temperature range 925° to 1225°C the results can be represented by the equation D = 1.51 × 10 −2 exp (‐71,200/ RT ) cm…
Theoretical study of the magnetic moments of Cu(II) complexes. Part 1.—Symmetrical trigonal bipyramidal and square pyramidal co-ordination
E. A. Boudreaux, Trans. Faraday Soc., 1963, 59, 1055 DOI: 10.1039/TF9635901055
Mechanisms of Transient Radiation Effects
Transient radiation effects are defined to be manifestations of electrons excited in materials, i. e., ionization effects. Manifestations of particular interest are the emission of secondary electrons from surfaces, conduction in ionized gases, semiconductors and insulators, and the emission and absorption of optical…
Similarity rules for isothermal bubble growth
A normalized formulation of the problem of isothermal bubble growth, dominated by viscosity and diffusion, reveals that in its full generality the problem involves eight dimensionless parameters. Limiting cases for extreme values of each of these parameters are investigated.
THERMODYNAMICS OF IRON OXIDES
By emf measurements of galvanic cells, containing FeO/sub 1+x/, it was shown that FeO/sub 1+x/ is not an adiathermal solid solution of two iron oxides. (auth)
432. 2,2′-Bipyrrolic macrocyclic ring systems
A. W. Johnson, I. T. Kay and R. Rodrigo, J. Chem. Soc., 1963, 2336 DOI: 10.1039/JR9630002336
The Difference Effect on Magnesium Dissolving in Acids
The difference (Δ) effect on Mg metal was measured in , , and of concentrations between 0.05 and 0.50 N at 25 °C. Generally the effect was positive, but the usual linear relationship between Δ and I existed only at low current densities and high acid concentrations. In and , the positive effect changed to negative at…
Oxidation reduction step in catalytic decomposition of hydrogen peroxide by ferric ions
M. L. Kremer, Trans. Faraday Soc., 1963, 59, 2535 DOI: 10.1039/TF9635902535