Materials Literature
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This paper describes the use of quantitative mineralogy and specific surface area in interpreting the index properties of clayey soils from nine sites in Eastern Canada. Samples representative of the Tyrrell, Laflamme, Champlain, and Goldthwait marine seas and Lac Barlow–Ojibway have been studied.Quantitative X-ray di…
High-resolution measurements of the cubic refractive index $n$ ($700 \mathrm{K}<T<1000 \mathrm{K}$) and of the tetragonal and orthorhombic birefringence $\ensuremath{\Delta}n$ ($480 \mathrm{K}<T<705 \mathrm{K}$ and $300 \mathrm{K}<T<490 \mathrm{K}$, respectively) are performed on ${\mathrm{KNbO}}_{3}…
A systematic study of the crystal structure of titanomagnetites was undertaken to characterize the effects of composition and quenching temperature on the cation distribution. Powder specimens ranging in composition from pure magnetite to a slightly nonstoichiometric ulvrispinel were synthesized at temperatures betwee…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAcid-base catalysis of the elimination and isomerization reactions of triose phosphatesJohn P. RichardCite this: J. Am. Chem. Soc. 1984, 106, 17, 4926–4936Publication Date (Print):August 1, 1984Publication History Published online1 May 2002Published inissue 1 August 1984http…
The Raman spectra of a number of glasses in the system CaO-MgO-SiO2 have been prepared using solar furnace techniques. The spectra of glasses along the SiO2-CaO &apos; SiO2-MgO and SiOz-Cao sMgo sO joins are similar to those obtained in other studies, and are interpreted in terms of vibrations of tetrahedral silic…
Abstract A rapid and simple test to distinguish halloysite from kaolinite in mineral mixtures has been developed based on differences in the rate and extent of formamide intercalation. With halloysite, complex formation was both rapid (<1 hr) and complete, whereas no significant intercalation occurred with kaolinit…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSilicon-29 and aluminum-27 high-resolution MAS-NMR spectra of phyllosilicatesJ. Sanz and J. M. SerratosaCite this: J. Am. Chem. Soc. 1984, 106, 17, 4790–4793Publication Date (Print):August 1, 1984Publication History Published online1 May 2002Published inissue 1 August 1984ht…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSyntheses and characterization of heteroatom-bridged metal-free phthalocyanine network polymers and model compoundsArthur W. Snow, James R. Griffith, and N. P. MarulloCite this: Macromolecules 1984, 17, 8, 1614–1624Publication Date (Print):August 1, 1984Publication History P…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface-enhanced Raman spectrometry for trace organic analysisTuan. Vo-Dinh, M. Y. K. Hiromoto, G. M. Begun, and R. L. MoodyCite this: Anal. Chem. 1984, 56, 9, 1667–1670Publication Date (Print):August 1, 1984Publication History Published online1 May 2002Published inissue 1 A…
A series of H2, Mg, VO, Co, Ni, Cu, Zn, Pd, Pt, Bi, and Pb 4, 4', 4'', 4'''-tetracumylpenoxy phthalocyanine, MPcXZ4, was synthesized. By vapor pressure osometry measurements of toluene solutions at 65 C, all MpcX4 compounds were dimeric complexes except PbPcX4 which is monomeric and Cu, Ni, Pd and PtPcX4 which form la…
Electrical oxidation of bis(ethylenedithiolo)tetrathiofulvalene (BEDT-TTF) 1 in a nitrogen saturated tetrahydrofurane solution containing (n-C4H10)4N+I3 as electrolyte results in the deposition of crystal plates of (BEDT-TTF)+ 2I3 (C10H8S8)2I3. These two dimensional crystals are triclinic, space group P1, a = 9.211(2)…
Abstract. From this brief review it appears that the interactions between calcium ions and cell walls play a key role in plant physiology. Calcium ions are involved in many mechnisms: for example, stabilization of cell wall structures, acidic growth, ion exchange properties, control of the activities of wall enzymes.…
Radiation-induced deterioration of fission reactor materials is dominated by displacement damage. In fusion reactors, the influence of (n, α) produced helium upon material deterioration is regarded to be of equal importance because of the high nuclear reaction rate caused by the high-energy fusion neutrons. In this re…
Raman spectroscopy studies of alkali and alkaline earth silicate glasses and melts are reviewed, and the major Raman bands observed are summarized. To realize the full potential of Raman spectroscopy will require a detailed understanding of their vibrational properties in relation to structure. A number of vibrational…
Since the discovery, by Meyer et al. [1] in 1975, of ferroelectric liquid crystals (FLCs) they remain the object of intensive investigations. In 1978 Pikin and Indenbom suggested a model for the thermodynamic description of the FLC physical properties, including the macroscopic response to the external fields [2]. Lat…
The crystalline modifications of carbon described in the literature are briefly reviewed. The publications in which new types of structures, differing from the diamond and graphite lattices, are proposed and discussed are analysed in detail. The geometrical-topological characteristics of the hypothetical modifications…
The authors report infrared and Raman spectroscopic investigations of single crystals of tris-sarcosine calcium chloride (TSCC), of the isomorphous tris-sarcosine calcium bromide (TSCB) and of mixed crystals with different chlorine-bromine concentration ratios x (for TSCC 1-x B x ) in the whole wavenumber region below…
The authors present evidence for the existence of a phase transition observed at 282K on warming in 1T-TaS 2 , through differential scanning calorimetry, in-plane electrical resistivity and Hall coefficient measurements. Some in-plane anisotropy is revealed, indicating that this transition may be mainly, though not wh…
Energy-dispersive x-ray diffraction studies have been made on BaTe to 410 kbar. It undergoes a first-order phase transition from the sodium chloride structure to the cesium chloride structure at 48 kbar. $P(V)$ data were obtained over the entire range. Optical studies indicated by extrapolation that metallization will…
This book is intended to fiber technologists, textile dealers, and textile salesmen a practical guideline to become acquainted with and to deepen their knowledge of the processes for the manufacture of film tapes, split-film yarns, and fibrillated film fibers.