Materials Literature
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Domain spacing in SmCo5 is observed to increase by a factor of 1.5 at 78 K as compared with the spacing at room temperature. This indicates a difference in domain wall energy, which may explain the experimentally found difference in coercive force.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis, stereochemistry, and mechanism of formation of mixed bis(dithiolato)nickel dimersAlvin Hermann and Richard M. WingCite this: Inorg. Chem. 1972, 11, 6, 1415–1420Publication Date (Print):June 1, 1972Publication History Published online1 May 2002Published inissue 1 J…
The N(z) distribution, the Wilson ratio and variance values have been determined for the case of twinned crystals where non-equivalent reflexions coincide exactly. The results have been applied to a practical example. The structural reasons for twinning may require that only reflexions occurring at relatively large Br…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReactions and Technological Properties of Sulfur-Treated AsphaltUgo Petrossi, P. L. Bocca, and Pierpaolo PacorCite this: Ind. Eng. Chem. Prod. Res. Dev. 1972, 11, 2, 214–219Publication Date (Print):June 1, 1972Publication History Published online1 May 2002Published inissue 1…
Masao Kiyama, Toshio Takada; Iron Compounds Formed by the Aerial Oxidation of Ferrous Salt Solutions, Bulletin of the Chemical Society of Japan, Volume 45,
Abstract Detailed studies of the fusion of natural rubber, following isothermal crystallization, has revealed a hitherto undetected low temperature transition which depends on the crystallization temperature. This transition is shown to be a melting phenomenon which is not caused by any polymorphic structural changes.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCharacterization of a d7 iron system. Tetraphenylporphineiron(I) anionIrwin A. Cohen, David Ostfeld, and Barry LichtensteinCite this: J. Am. Chem. Soc. 1972, 94, 13, 4522–4525Publication Date (Print):June 1, 1972Publication History Published online1 May 2002Published inissue…
Summary A kinetic method is described and investigated for determining exchangeable Al in acid soils using M NH 4 Cl solutions the pH and leaching rate of which was critical for obtaining accurate and reproducible values. Molar concentrations of ammonium acetate displaced at least part of the Al chelated to functional…
"Thermal Analysis of Pressurized Water Reactors." Nuclear Science and Engineering, 48(2), p. 233
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructural evolution of chromiaP. Ratnasamy and A. J. LeonardCite this: J. Phys. Chem. 1972, 76, 13, 1838–1843Publication Date (Print):June 1, 1972Publication History Published online1 May 2002Published inissue 1 June 1972https://pubs.acs.org/doi/10.1021/j100657a009https://d…
Abstract Textural types and precipitation mechanisms in samples from the Caribbean and Mediterranean regions
A method is proposed for the simultaneous extraction of plant-available Al and Mn from acid soils that consists of shaking the soil in 0.02 M CaCl 2 (1:2 ratio) for 1 hr. The method was developed by comparing the amounts of these elements extracted by different concentrations of the salt and by different extraction ti…
The optical and dielectric properties of water in the vacuum ultraviolet are presented and discussed. Optical constants at energies up to 14.6 eV were obtained by a Kramers-Kronig analysis using reflectances measured in this study between 9.2 and 14.9 eV and reflectances calculated from data in the literature below 9.…
Experimental reflectance data for silicon are corrected for the presence of a surface oxide layer and analyzed using the Kramers-Kronig relation to yield a set of optical constants for oxide-free silicon. For etched silicon samples exposed to the atmosphere for ∼ 1 h, this layer is 12–15 Å thick and has the approximat…
Based on the wetting properties of a ‐Al 2 O 3 , and pyrolytic graphite by liquid metals, the critical surface energy for spreading was determined and compared with the surface energy of the ceramics. The surface energy γ‐ 8 (ergs/cm 2 ) of the (0001) surface of a ‐Al 2 O 3 is estimated to be 892–0.12 T (°C), that of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrigin of some charge-transfer spectra. Oxo compounds of vanadium, molybdenum, tungsten, and niobium including heteropoly anions and heteropoly bluesHyunsoo So and Michael T. PopeCite this: Inorg. Chem. 1972, 11, 6, 1441–1443Publication Date (Print):June 1, 1972Publication H…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRedetermination of the structure of porphineBetty M. L. Chen and A. TulinskyCite this: J. Am. Chem. Soc. 1972, 94, 12, 4144–4151Publication Date (Print):June 1, 1972Publication History Published online1 May 2002Published inissue 1 June 1972https://pubs.acs.org/doi/10.1021/ja…
The ratio of the elastic constants of nematic liquid crystals is calculated using a simple inner field model. The result obtained is k11′: k22 : k33′: k24 : k13(2)=5:11:5:-9:-6. The first three constants, which are the constants for splay, twist, and bend, respectively, are found to be positive, in contrast with the r…
Abstract We present a theoretical treatment and give experimental observations of the deformation that occurs in a nematic liquid crystal when electric or magnetic fields are applied. We consider only normal deformations in the nematic material where fluid flow and other dynamic phenomena play no role. Three important…
Abstract Electronic energy band calculations for transition metal hydrides have provided a new theoretical understanding of these materials. The calculations show when the proton model has relevance and when the anion model is more appropriate, the essential feature being the structure of the hydride. The structure in…