Materials Literature
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The γ→α phase transformation of Fe 2 O 3 under high pressure and after effects of pressure squeezing upon the magnetic properties of γ-Fe 2 O 3 were studied. The study on the phase transformation was conducted under the pressure up to 3.3×10 4 kg/cm 2 in the temperature range of 150°–300°C. It was found that γ-Fe 2 O…
Abstract The glass transition temperature of polyacrylonitrile has been determined for polymer varying in molecular weight from 8 × 10 3 to 3 × 10 6 . Results could be represented by T g = (96.5 ± 1.0) − (2.8 ± 0.1) × 10 5 /M̄ n , giving for the glass temperature of a polymer of infinite chain length, 96.5 ± 1.0°C. Sp…
Abstract Die Umsetzung von SiCl 4 mit Silicium bei 1250°C im Hochvakuum liefert das polymere Siliciumdichlorid [SiCl 2 ] x equation image Sowie nach equation image die Si‐Subchloride Si 2 Cl 6 , Si 3 Cl 8 ,Si 4 Cl 10 , Si 5 Cl 12 und Si 6 Cl 14 . Die Pyrolyse des [SiCl 2 ] x verlauft unter Bildung von [SiCl <2 ] x…
The infrared absorption spectra of sodium silicate glasses of molar composition Na 2 O·xSiO 2 (where = 5, 4, 3, and 2) were determined with unpolarized radiation in the 4 to 30μ region. The glass spectra showed a definite similarity to the spectra of α‐quartz, with lattice vibrational bands around 1066,786, and 464 cm…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOxygen Stoichiometry in the Compound BaFeO3-xH. J. Van HookCite this: J. Phys. Chem. 1964, 68, 12, 3786–3789Publication Date (Print):December 1, 1964Publication History Published online1 May 2002Published inissue 1 December 1964https://pubs.acs.org/doi/10.1021/j100794a041htt…
The linear electro-optic coefficients of KH2PO4 and a number of its isomorphs have been measured at room temperature using dc voltages. The results at 546 nm are as follows: r63 = 10.3±0.1×10−12 m/V for KH2PO4, 10.9±0.1×10−12 m/V for KH2AsO4, and 13.0±0.2×10−12 m/V for RbH2AsO4; r41 = 8.77±0.14×10−12 m/V for KH2PO4, 2…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStable Carbonium Ions. X.1 Direct Nuclear Magnetic Resonance Observation of the 2-Norbornyl CationPaul von R. Schleyer, William E. Watts, Raymond C. Fort, Melvin B. Comisarow, and George A. OlahCite this: J. Am. Chem. Soc. 1964, 86, 24, 5679–5680Publication Date (Print):Dece…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Chemistry of Argentic Oxide. The Formation of a Silver(III) Complex with Periodate in Basic SolutionGeorge L. Cohen and Gordon AtkinsonCite this: Inorg. Chem. 1964, 3, 12, 1741–1743Publication Date (Print):December 1, 1964Publication History Published online1 May 2002Pub…
Evidence on lattice displacements due to nitrogen platelets in diamond is reviewed. It is shown that interplanar spacings of a diamond containing platelets may differ in either sense from that of pure diamond, depending upon the index of the Bragg reflection. Structures previously proposed for substitutional nitrogen…
The defect structure of monoclinic zirconia was investigated by measuring the oxygen partial pressure dependence of the electrical conductivity and sample weight. Techniques were developed to calculate the degree of nonstoichiometry and the mobility of the charge carriers from electrical and weight change data. ZRO 2…
An investigation has been made of the chemical and mineralogical transformations which have accompanied the weathering of six basic volcanic rocks from eastern New South Wales. Montmorillonite is initially formed from the destruction of the olivine, pyroxene, and plagioclase in the parent rock, but, in the near-surfac…
ABSTRACT The effects of external osmotic pressure on the rates of development and emergence, respiration, and on changes in glycogen, glycerol, and trehalose concentrations have been studied in cysts of Artemia salina. The only measured effect of external osmotic pressures less than 30 atm. on emergence and developmen…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAdditions and Corrections - Hydrogen Bonding in Fluoro AlcoholsW. J. Middleton and R. V. Lindsey, Jr.Cite this: J. Am. Chem. Soc. 1964, 86, 24, 5712Publication Date (Print):December 1, 1964Publication History Published online10 May 2004Published inissue 1 December 1964https:…
The preparations, colours, lattice constants, experimental and X‐ray densities of fluorite‐type mixed phases between bismuth(III) oxide and the dioxides of U, Th, Ce, and Zr are described. In the systems UO 2 BiO 1.5 , ThO 2 BiO 1.5 and CeO 2 BiO 1.5 , fluorite phases occur from 0 to 100, 60 and 40 mole per cent Bi…
"Nuclear Chemistry and its Applications." Nuclear Science and Engineering, 20(4), pp. 551–552
The theory of Aden and Kerker on the scattering of electromagnetic waves from two concentric spheres has been applied to the interaction of light with two-layer metallic colloids. Starting with gold nuclei 59 Å in ``diameter,'' silver layers 5 to 220 Å in thickness have been grown epitaxially. The optical absorption s…
The optical absorption and fluorescence spectra of trivalent thulium in single crystals of yttrium oxide and the absorption spectrum of pure thulium oxide, are investigated. All the 4f12 electronic energy levels except the 1S0 level are identified. The three Slater Fk parameters and the spin—orbit parameter ζ, giving…
Room-temperature microwave ferrimagnetic resonance measurements of the large uniaxial magnetocrystalline anisotropy fields (Han) of two compositional series of hexagonal ferrimagnetic oxides are reported. Han was found to increase rapidly in the Al-substitution series (SrO·xAl2O3·(6−x)Fe2O3) from 19.3 to 53.4 kOe as x…
The Verdet constants of a number of glasses have been measured with the object of studying the Faraday effect in glass. The Verdet constant was measured for three types of glasses: (1) optical glasses, where the Verdet constant correlates well with the reciprocal dispersion; (2) diamagnetic glasses, where glasses whic…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolymerization of Drying OilsHerman WexlerCite this: Chem. Rev. 1964, 64, 6, 591–611Publication Date (Print):December 1, 1964Publication History Published online1 May 2002Published inissue 1 December 1964https://pubs.acs.org/doi/10.1021/cr60232a001https://doi.org/10.1021/cr6…