Materials Literature
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We have prepared the layered compounds $\mathrm{Li}{\mathrm{Ti}}_{1\ensuremath{-}y}{M}_{y}{\mathrm{S}}_{2}$ ($M=\mathrm{V},\phantom{\rule{0ex}{0ex}}\mathrm{C}\mathrm{r},\phantom{\rule{0ex}{0ex}}\mathrm{F}\mathrm{e}$) by direct synthesis from a mixture of ${\mathrm{Li}}_{2}$S and the appropriate elements. The structure…
The ASTM standard ferric sulfate-sulfuric acid test (ASTM A262-B) and copper-copper sulfate-sulfuric acid test (ASTM A262-E) have been modified to quantify the degree of sensitization (DOS) of ferritic stainless steel Types 430, 430 Ti, 430 Nb, 434, 444, and 446. The modified ferric sulfate-sulfuric acid test consists…
Binary mixtures both components of which are liquid crystals are known to form continuous mixed liquid crystals.1 Most of them do not undergo any change in their mesomorphic textures, though a few have been found to give rise to different textures.2 We report here a binary system consisting of (A) p-nitrophenyl-p'-n-a…
The optical properties of a periodic structure characterized by a uniform rotation of the dielectric tensor about a given axis are theoretically analyzed. The electromagnetic wave is described as a superposition of elementary modes having the form of Bloch waves. Each elementary mode is represented by a sum of plane w…
The dynamics of ferroelectric phase transition of KH2PO4 (KDP) have been clarified by means of Raman scattering experiments. The locally and momentarily distorted PO4 tetrahedrons play the main role on the ferroelectric phase transition in KH2PO4. The broad mode below ∼150 cm-1 in x(yx)y spectrum above the transition…
Abstract The thermal oxidation of undoped trans ‐polyacetylene powder in dry air has been studied and the principal features of the mechanism have been developed. Thermogravimetric and differential thermal analysis reveal an exothermic process that first leads to a weight increase, followed by precipitous weight loss…
Abstract Detailed quantitative studies are reported on the kinetics of acetonitrile pyrolysis using an isothermal quartz tubular flow reactor at 720–1033 K and 1 atm. Pressure using flow rates, in nitrogen, of 2–200 ml min −1 . The pyrolysis of several other nitriles (acrylonitrile, propionitrile, methacrylonitrile an…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAlkali metal insertion in the pyrochlore structureD. W. Murphy, J. L. Dye, and S. M. ZahurakCite this: Inorg. Chem. 1983, 22, 25, 3679–3681Publication Date (Print):December 1, 1983Publication History Published online1 May 2002Published inissue 1 December 1983https://pubs.acs…
High damping materials find numerous uses in the field of vibration and noise reduction in more or less complex structures. The high damping required in such structures can be structural damping or materials damping, although the distinction is not always clear-cut. Damping depends on a number of external parameters s…
Actinide oxides used for nuclear reactor fuels have fluorite-type cubic structure. In this crystal structure, the self-diffusion coefficients of the constituent ions are closely related to its sublattice structure. Characteristics of the actinide oxides are reviewed with respect to self-diffusion and chemical diffusio…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAn EXAFS study of the thermal decomposition of molybdenum trisulfideDeborah R. Huntley, T. G. Parham, R. P. Merrill, and M. J. SienkoCite this: Inorg. Chem. 1983, 22, 26, 4144–4146Publication Date (Print):December 1, 1983Publication History Published online1 May 2002Publishe…
Bone mineral and synthetic calcium-deficient carbonate apatite (CDCA), when defined in terms of their respective thermal stabilities and ignition products, are homologous. When heated to 550 degrees, they may have a structure similar to that of the mineral dahllite. When heated to temperatures greater than 550 degrees…
Micromechanisms of transgranular cleavage fracture in ferritic steels have been investigated, particular attention being paid to the dependence of cleavage fracture stress σf on grain size over the range from 3·5 to 34·3 μm. It is found that σf increases less than linearly with d−1/2, where d is the grain diameter, wh…
Kinetics of the anionic polymerization of ε-caprolactone (εCL) initiated with (CH3)3SiO−K+ and carried out in THF solution has been studied in the temperature range from 0 to 20°C by using a calorimetric method. From the kinetic results and from conductometric measurements of the dissociation constant of the living Po…
We recently reported the discovery of stable disclinations of strength ± 3/2 and ± 2 in mixtures of several nematogenic compounds with a non-mesomorphic compound having plate-like molecules. We describe here further detailed observations on these defects, particularly on pairs of high strength disclinations.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTImidazole complexes of low-spin iron(III) porphyrin .pi.-cation radical species. Models for the compound I .pi.-cation radical state of peroxidasesHarold M. Goff and Martin A. PhillippiCite this: J. Am. Chem. Soc. 1983, 105, 26, 7567–7571Publication Date (Print):December 1,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpectroscopic properties, electronic levels, and crystal field parameters of pentakis(nitrato)europate(III) ionsJ. C. G. Buenzli, B. Klein, G. O. Pradervand, and P. PorcherCite this: Inorg. Chem. 1983, 22, 25, 3763–3768Publication Date (Print):December 1, 1983Publication His…
Correlation of octahedral ion electronegativity with band frequency appears to best account for observed OH stretch frequencies in the di- and trioctahedral minerals potassic mica, talc and saponite. The site of charge substitution in the octahedral layer or in the tetrahedral layer affects the band frequencies also.…
Abstract Spherical kaolinite has been synthesized for the first time from noncrystalline aluminosilicate material in hydrothermal experiments conducted between 150° and 250°C and under autogenous vapor pressure. Spherules, whose mean diameters depended on growth conditions (0.1–0.6 μ m), were formed surrounding the no…
Laser excited fluorescence and infrared absorption spectra of single crystals of praseodymium diluted with anhydrous lanthanum trichloride was examined. A number of new fluorescing levels have been observed, numerous additional crystal field components identified, and a more complete energy level scheme is presented.