Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRefinement of the crystal structure of orthorhombic zinc chlorideH. L. Yakel and J. BrynestadCite this: Inorg. Chem. 1978, 17, 11, 3294–3296Publication Date (Print):November 1, 1978Publication History Published online1 May 2002Published inissue 1 November 1978https://pubs.ac…
The oxidation of the active, high energy density materials, titanium and titanium hydride, has been studied by electrochemical and electron spectroscopic techniques. The apparent thickness of the oxide was controlled by the magnitude of the applied potential across thin (200–6000Å) films of these materials. Our electr…
The structural phase transition in the ferroelectric semiconductor alloy series ${\mathrm{Sn}}_{x}{\mathrm{Ge}}_{1\ensuremath{-}x}\mathrm{Te}$ has been investigated using high-precision x-ray techniques. The spontaneous strain occurring at the cubicrhombohedral transition has been measured as a function of temperature…
Abstract The dark brown anti-ferromagnetic modification of (C 5 H 5 ) 2 Mn crystallizes ortho-rhombic, space group Pna2 1 (or Pnam) with a= 1402.7(2), 6 = 582.9(1), c = 996.5(1) pm and Z = 4. It forms polymer chains with a zigzag arrangement of C 5 H 5 Mn units and additional bridging C 5 H 5 -rings between adjacent i…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe dioxygen adducts of several manganese(II) porphyrins. Electron paramagnetic resonance studiesBrian M. Hoffman, Thomas Szymanski, Theodore G. Brown, and Fred BasoloCite this: J. Am. Chem. Soc. 1978, 100, 23, 7253–7259Publication Date (Print):November 1, 1978Publication Hi…
The mechanisms by which chlorides are removed from marine iron artifacts during washing processes were investigated. By comparing the decomposition rates of FeOCl and the chloride extraction rates it was shown that, under most conditions, the chloride removal process is diffusion controlled. The implications of this w…
The thermal radiation from metals is calculated by including the Holstein processes of phonon-assisted and surface-assisted scattering in the free-electron model. This approach provides a fairly accurate description of the experimentally measured total emissivity of good conductors in terms of the dc resistivity and t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRate of electron exchange between iron, ruthenium, and osmium complexes containing 1,10-phenanthroline, 2,2'-bipyridyl, or their derivatives from nuclear magnetic resonance studiesMan-Sheung Chan and Arthur C. WahlCite this: J. Phys. Chem. 1978, 82, 24, 2542–2549Publication…
Abstract Dynamic mechanical properties of polystyrene (PS) and polymethylmethacrylate (PMMA) filled with glass beads and mica flakes have been investigated. The α‐dispersion temperature ( T α ) increases with filler content in each system. The increase in T α is larger for PMMA than for PS in the case of the same fill…
Various means of deuteration have been used to establish the hydrogenic origin of both the 119-G and 74-G hyperfine doublets observed in a variety of irradiated vitreous silica samples. The g values of both these defects appear inconsistent with an earlier model in which these lines were attributed to a hole localized…
The problem of the highly correlated electron gas ${\mathrm{V}}_{2}$${\mathrm{O}}_{3}$ consisting of a filled ${a}_{1g}$ and a quarterly full ${e}_{g}$ band is treated on the basis of a Hartree-Fock calculation with spin and orbit unrestriction. The values of the effective hopping integrals which include covalency eff…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCompatibility in Blends of Poly(methyl methacrylate) and Poly(styrene-co-acrylonitrile). 1. Physical PropertiesK. Naito, G. E. Johnson, D. L. Allara, and T. K. KweiCite this: Macromolecules 1978, 11, 6, 1260–1265Publication Date (Print):November 1, 1978Publication History Pu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectron spin resonance, magnetic, and x-ray crystallographic studies of a binuclear, imidazolate bridged copper(II) complex, [(TMDT)2Cu2(im)(ClO4)2](ClO4)Chi-Lin O'Young, John C. Dewan, Henry R. Lilenthal, and Stephen J. LippardCite this: J. Am. Chem. Soc. 1978, 100, 23, 72…
On the basis of our theoretical examination of the insulating state of ${\mathrm{V}}_{2}$${\mathrm{O}}_{3}$ reported in the preceding two papers and the experimental results of NMR and susceptibility measurements of the metallic phase, we conjecture the highly correlated electron-gas character in this latter phase of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReactions of organic anions. 86. Sodium and potassium carbonates: efficient strong bases in solid-liquid two-phase systemsMichal Fedorynski, Krzysztof Wojciechowski, Zygmunt Matacz, and Mieczyslaw MakoszaCite this: J. Org. Chem. 1978, 43, 24, 4682–4684Publication Date (Print…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFormation of a New Crystal Form (αp) of Poly(vinylidene fluoride) under Electric FieldD. Naegele, D. Y. Yoon, and M. G. BroadhurstCite this: Macromolecules 1978, 11, 6, 1297–1298Publication Date (Print):November 1, 1978Publication History Published online1 May 2002Published…
We find that certain cyano Schiff bases and cyanobiphenyls with alkyl or alkoxy end groups exhibiting a bilayer smectic-$A$ phase, also exhibit a reentrant nematic phase at high pressure. A tentative model of the bilayer smectic-$A$ phase and the mechanism whereby the reentrant transition may occur is presented.
Abstract not Available.
For pt.I see Act Crystallogr., vol.B32, p.1348 (1976). The intermetallic compound Fe 3 Sn 2 has been studied by neutron diffraction and magnetisation measurements. This compound is ferromagnetic (T C =657K). At room temperature the spin direction is along the c axis. A spin rotation is observed between approximately 2…
Research on metal–insulator transitions is at the moment quite fashionable. In many materials the electrical behavior changes from metallic to nonmetallic when the pressure, temperature or magnetic field is varied or (as in alloys) when the composition is varied, and the theoretical description of these processes is q…