Materials Literature
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Abstract When heated to high temperatures under zero tension, some of the molecules in oriented nylon 66 filters change from the elongated to the folded conformation, with no change in crystal orientation. This transformation is shown by a combination of structural and physical property measurements: wide and small an…
Abstract Durch Aufdampfen auf atomar ebenes und reines Cu(111) wurden sehr dünne, flächenhafte Ni(111)‐Epitaxieschichten hergestellt. Der Atomabstand von Ni in der Schichtebene gleicht sich dabei oberhalb 10 Å partiell, unterhalb 10 Å bei einer Dehnung von 2,5% vollständig an den der Cu‐Unterlage an („Pseudomorphie”︁)…
Abstract An attempt was made to evaluate the apparent elastic constant of a two‐phase system G from those of the components of the system. The modulus G is expressed as follows: where G 1 and G 2 are the shear moduli of the suspending medium and the suspended particles, respectively, v 1 is the Poisson ratio of the me…
A model for F-centre production in alkali halides by ionizing radiation is discussed. The energy required for the formation of the defect is given to an anion in the radiationless recombination of an electron and a hole, which takes place via an exciton state. The primary products of this mechanism are negative ion in…
Abstract Measurements of the thermoelectric power, transverse Nernst‐Ettinghausen effect, conductivity, and Hall effect allow the concentration and temperature dependence of the electronic effective mass m * to be calculated for crystals of the solid solution (InSb) x (InTe) 1—x (for × = 1 to 0.85) in the temperature…
Eleven amine complexes of zinc benzothiazole-2-thiolate have been prepared from the ammonia complex. Dissociation of the pyridine complex provides a convenient route to the thiolate, which is difficult to prepare by other methods.
本文用X射线衍射的方法全面地研究了Cu-Au二元系合金经不同时间(一个月、三个月、六个月、一年)熟炼后缓冷到室温,以及在300℃和600℃淬炼后的物相与相转变过程;精确地测定了点阵间隔,以研究其随成份和热处理的变迁;探讨了长周期超结构的堆垜周期同成份和温度的关系;并用保持不同热处理时间后淬炼的方法来研究等原子成份处的有序化过程。在上述的热处理条件下,整个二元系共出现了六种不同的相:α1是Au在Cu中的固溶体,α′1是相当于Cu3Au的超结构,α2是Cu在Au中的固溶体,α′2是相当于CuAu3的超结构,k是相当于CuAuⅠ的超结构,k′是相当于CuAuⅡ的超结构。值得注意的是,随着热处理时间的加长,有序区逐渐扩大,二相区逐渐缩小,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBroad-Line Proton Magnetic Resonance Spectra of Dichloro (1,2,4-triazole) copper (II) and Bis (1,2,4-triazolato) copper (II)Motomichi Inoue and Masaji KuboCite this: Inorg. Chem. 1966, 5, 1, 70–73Publication Date (Print):January 1, 1966Publication History Published online1 M…
Abstract Summarizing investigations on the solubility, nucleation and growth of NaCl in presence of K 4 Fe(CN) 6 are reported. Raising the contents of K 4 Fe(CN) 6 induces at first the formation of cubes, then skeletal forms and finally suppression of nucleation and growth for the duration of the experiment. Secondary…
Stress corrosion in titanium is caused by complex oxidation reactions. Reaction products were identified by X-ray diffraction, mass spectrometry, and gas chromatography. Chlorine gas was identified as an intermediate and regenerable reaction product that has a strong tendency to crack titanium. No reaction occurs if o…
The thermal behaviour of the two crystalline forms of germanium dioxide has been investigated by differential thermal analysis. Small amounts of lithium increase the rate of transformation. The enthalpy and entropy of transformation have been estimated as 5·05 ± 0·6 kcal. mole–1 and 3·9 ± 0·5 e.u., and the enthalpy of…
The thermal decomposition of iron(II), cobalt(II), and nickel(II) hydroxides has been investigated; kinetic parameters were obtained by isothermal and non-isothermal methods. The activation energies for the decomposition lie within the range 17–26 kcal./mole, in good agreement with values reported for the structurally…
The crystallization of calcium chloro‐ and chloro‐fluoroapatites from calcium halide fluxes was studied as a function of composition and heating schedules. Activation of was investigated by varying phosphor stoichiometry and firing methods. The results indicate that flux‐grown apatites are slightly deficient in and th…
A variety of linear tetrapyrrolic systems is described, all of which fail to yield macrocyclic compounds under conditions in which porphyrins are obtained from the appropriate 1,19-dideoxybiladienes-ac. The tetrapyrrolic compounds prepared include 5,5-bi-(dipyrromethenyls) for which several new synthetical routes are…
Abstract Die folgende Arbeit befaßt sich mit dem Ultrarotspektrum des Ferroelektrikums NaNO 2 , dessen Phasenübergang bei 163°C ein Order‐Disorder Übergang ist. Wir haben das Reflexionsspektrum im Bereich der äußeren UR‐aktiven Gitterschwingungen (30 bis 150 μm,) gemessen, und zwar für Polarisationsrichtungen des elek…
The thermal decomposition of borine carbonyl has been carried out in the presence of triethylamine, a very suitable scavenger of borine (BH3). The bimolecular reaction does not compete with the unimolecular rupture of the B–C bond. At 0°, the pressure-dependence of the unimolecular rupture has been studied, kunimol be…
The characteristics of the residual band at 3650 cm–1 in the infra-red spectrum of deuterated aerosils have been determined. The band corresponds to hydroxyl groups and not to molecular water. It is assigned to interacting hydroxyls sited on neighbouring silicon atoms within the solid lattice of the silica particles.…
Monohydroperoxides were isolated from chlorophyll-photosensitised oxidation of methyl oleate, methyl linoleate, methyl linolenate, and ethyl arachidonate. The positions of the hydroperoxide substituent were determined by two methods of analysis of the saturated hydroxy-esters formed by catalytic hydrogenation. Gas–liq…
Cobalt oxalate dihydrate dehydrated at 150° is porous, and the subsequent isothermal decomposition in a vacuum to cobalt differs considerably from the isothermal decomposition of the anhydrous oxalate prepared at a higher temperature. The characteristic feature of the decomposition of the porous anhydrous cobalt oxala…
Abstract The anisotropic resistivity of dislocations produced by deformation is measured in high purity Au, Ag, and Cu single crystals at liquid helium temperature. Resistivities along the direction perpendicular to the slip plane are found to be greater than those parallel to the slip plane. The ratio Δ ϱ⟂ /Δ ϱ∥ (whe…