Materials Literature
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The role of cerium in the suppression of gamma‐ray induced coloration in glass has been found to depend on the relative concentration of Ce 3+ to Ce 4+ ions as well as on the total cerium content. In a borate glass having high ultraviolet transmission, it has been found that both Ce 3+ and Ce 4+ ions are necessary to…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHexafluorides of Molybdenum, Tungsten, and Uranium. I. Reactions with Nitrous and Nitric OxidesJ. R. Geichman, E. A. Smith, S. S. Trond, and P. R. OgleCite this: Inorg. Chem. 1962, 1, 3, 661–665Publication Date (Print):August 1, 1962Publication History Published online1 May…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics of the Reactions of Diethylenetriamineaquoplatinum(II) Ion with Different LigandsHarry B. Gray and Richard J. OlcottCite this: Inorg. Chem. 1962, 1, 3, 481–485Publication Date (Print):August 1, 1962Publication History Published online1 May 2002Published inissue 1 Au…
The respiratory coefficient, expressed here as respiration per unit of chlorophyll, of six clones (five species) of diatoms was measured at temperatures of 5°, 10°, 15°, 20°, and 25 °C. The acclimatized cultures used were grown at each of these temperatures that supported sufficient growth. Considering any one of the…
The relation between the elastic moduli and temperature from room temperature to about 1300°C was determined for a group of vitreous silica specimens by a dynamic resonance method. All the curves were approximately parabolic in shape, reaching a maximum near 1050° to 1200°C. At the maximum value, Young's modulus was m…
A general method is developed for calculating electron diffraction intensities when many simultaneous reflections are considered. The exponential function of a `scattering matrix' is used, and numerical calculations are easily systematized and performed for various thicknesses. The generality and utility of the method…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTα,β,γ,δ-Tetra-(4-pyridyl)-porphine and Some of its Metal ComplexesEverly B. FleischerCite this: Inorg. Chem. 1962, 1, 3, 493–495Publication Date (Print):August 1, 1962Publication History Published online1 May 2002Published inissue 1 August 1962https://pubs.acs.org/doi/10.102…
Cyclotella nana Hustedt, a small centric diatom requiring vitamin B 12 , was tested as a potential assay organism for that vitamin. Dose–response curves, measured by optical density and cell count, showed a linear relation between growth and B 12 concentration between 0 and at least 2 μμg/ml of the vitamin. Since the…
Thermal and electrical conductivity measurements have been made between 2 and 90°K on samples of copper containing 0.5, 1 and 2 at. % platinum, of copper containing 2 and 4 at. % silicon, and of silver containing 2 at. % platinum and aluminium respectively. The lattice components of their thermal conductivities are de…
Stress-corrosion cracking has been determined as the cause of failure of carbon steel tanks in agricultural ammonia service. Effects of ammonia contaminants, such as air, water, carbon dioxide, oil, etc. on failure rates were studied. In general, air contamination increased stress-corrosion cracking and water in small…
The results of an experimental study of the temperature and strain-rate dependence of τIII for Cu–Zn alloys are described and interpreted in terms of Seeger's theoretical analysis of τIII. The values of the stacking-fault energy, γ, derived in this way are compared with the estimates of γ for the same alloys obtained…
From theoretical considerations a new clothing parameter, the moisture permeability index, has been developed, which describes the efficiency of fabrics or fabric systems in transferring moisture and its associated latent heat. This index extends the existing "clo" formula, which related dry or nonsweating heat loss t…
The phase diagram for the system Bi 2 O 3 ‐B 2 O 3 has been determined experimentally. The melting point of Bi 2 O 3 has been redetermined as 825° C with an estimated overall uncertainty of about ±3°C, and the molal heat of fusion of Bi 2 O 3 , calculated from the slope of the liquidus curve, is 2050 cal per mole. The…
This paper reports electron paramagnetic resonance data of substitutional ${\mathrm{Gd}}^{3+}$ impurities in the cubic and tetragonal phases of barium and strontium titanates. The pertinent spin Hamiltonian parameters are determined as a function of temperature in these two mentioned phases of both crystals. The tempe…
A theoretical study is made on the nuclear spin relaxation in magnetic crystals near their Curie temperatures. The exchange narrowed hyperfine broadening of the NMR line width is shown to increase due to the slowing down of a certain part of the electron spin fluctuations as the transition point is approached, giving…
Recent calculations of electron energy levels in body-centred cubic transition metals are used to estimate the position of the Fermi surface of non-magnetic chromium. It is shown that almost the whole of this surface is placed so that the introduction of an antiferromagnetic superlattice will lower the electron energy…
The thermal conductivity $K$ of a bulk sample of pyrolytic graphite has been measured from 3 to 300\ifmmode^\circ\else\textdegree\fi{}K both perpendicular and parallel to the $c$ axis. Over the whole temperature range below 100\ifmmode^\circ\else\textdegree\fi{}K the thermal conductivity in both directions appears to…
The crystal structures of α Al 2 O 3 , Ti 2 O 3 , V 2 O 3 , and Cr 2 O 3 have been refined using a least-squares analysis of single-crystal x-ray data. Interatomic distances and bond angles are calculated and compared with those of α Fe 2 O 3 .
An analysis is presented for the absorption corrections necessary for the x-ray analysis of diffraction data from a liquid sample confined within a cylindrical sample cell. The evaluation of necessary absorption integrals has been formulated in a numerical calculus procedure appropriate for a digital computer. The pro…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermal Conductivity of Heterogeneous Two-Component SystemsR. L. Hamilton and O. K. CrosserCite this: Ind. Eng. Chem. Fundamen. 1962, 1, 3, 187–191Publication Date (Print):August 1, 1962Publication History Published online1 May 2002Published inissue 1 August 1962https://pubs…