Infrared study of cation ordering and clustering in some (Fe,Mg) amphibole solid solutions
R. G. J. Strens, Chem. Commun. (London), 1966, 519b DOI: 10.1039/C1966000519B
Materials Literature
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Passivation and pitting characteristics of zinc
The passivation of a zinc electrode has been studied both by galvanostatic and potentiostatic methods in boric acid-sodium hydroxide buffer solutions. After addition of chloride ion, the characteristics of pitting corrosion have been investigated. The results indicate that pits form only on a passive surface and that…
A Spectrophotometric Study of the Nd3+-NO3- Association1
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Spectrophotometric Study of the Nd3+-NO3- Association1Nathan A. Coward and Robert W. KiserCite this: J. Phys. Chem. 1966, 70, 1, 213–217Publication Date (Print):January 1, 1966Publication History Published online1 May 2002Published inissue 1 January 1966https://pubs.acs.or…
The inhibition of the corrosion of iron in alkaline solutions
The inhibition of the corrosion of iron in alkaline solutions is due to the anodic formation of a film of a ferrous compound, which is usually ferrous hydroxide, but in the presence of anions yielding less soluble ferrous salts, e.g. carbonate, the composition may be mixed. The ferrous compounds are subsequently oxidi…
An X-ray investigation of silver nitrate: a unique metal nitrate structure
The crystal structure of silver nitrate has been elucidated from an X-ray analysis. The crystals are orthorhombic, a= 6·997, b= 7·325, c= 10·118 Å, z= 8, space group Pbca (D2h15). Silver atoms lie essentially in planes parallel to (010) and separated by b/2. These planes are linked by the symmetry-related nitrate grou…
Stresses on secondary systems due to piled-up groups of dislocations of arbitrary orientation
Stress-fields around piled-up groups of dislocations of arbitrary orientation have been calculated by replacing the discrete dislocations by a continuous distribution of infinitesimal dislocations. Previous calculations by Mitchell (1964) have been performed on edge and screw dislocation pile-ups. In the present paper…
DIRECTIONAL SOLIDIFICATION OF ALUMINIUM–COPPER ALLOYS IN A MAGNETIC FIELD
The degree of normal segregation, occurring during directional (normal) freezing in a transverse magnetic field of 34 000 oersteds, has been determined for aluminium–copper alloys solidified for rates of [Formula: see text] to 4 inches per hour. For ingots in the composition range 0.5% < %Cu < 4.5%, solidified a…
Voltage Effects in Cholesteric Liquid Crystals
Liquid crystal mixtures were sandwiched between two transparent electrodes on glass and a direct or alternating potential was applied. The light scattering property of the liquid crystal changes upon application of voltage, the intensity varying from 1 to 10% of that scattered by a MgO diffuse surface. The maximum inc…
Étude spectrophotométrique de l'absorption bleue et violette de Cu2O
Étude spectrophotométrique de l'absorption bleue et violette de Cu2O aux températures de l'azote et de l'hélium liquides. On a pu évaluer le facteur d'intensité d'oscillateur des raies bleues et violettes et attribuer le spectre à des transitions excitoniques de première classe.
Photoconductivity and drift mobilities in single crystal realgar (As4S4)
Abstract The photoconductivity and carrier mobilities of synthetic crystals of realgar (As 4 S 4 ) have been investigated. A sharp increase in the photoresponse at short wavelengths is attributed to an energy gap of (2.40 ± 0.05) eV. An additional weak peak in the photoresponse at 600 nm is due to free hole formation…
On the Origin of M‐Induced Anisotropy in Nickel and Permalloy Films
Abstract The anisotropy field strength H K is measured in thin nickel and 81/19 nickel‐iron films immediately after deposition and during subsequent systematic annealing in external magnetic fields. These measurements are performed with the films kept in ultra high vacuum using a planar Hall effect method. An analysis…
Thermally induced solid‐state polymerization in nylon 66
Abstract The thermally induced solid‐state polymerization of 66 nylon was investigated. It was found that the rate‐controlling step in the process is chemical reaction. A mechanism of the form, rate = kt n was shown to hold. The reaction rate constant was found to be k = 1.53 × 10 10 exp [ − 12,960/ RT ]. Units of k a…
Unusual magnetic behaviour of some iron( II )–bis-(1,10-phenanthroline) complexes
The first page of this article is displayed as the abstract.
Strahleninduzierte Phasenumwandlungen einiger Substanzen des Perowskit‐Gittertyps und ihre thermodynamische Behandlung
Abstract Es werden experimentelle Ergebnisse über die thermischen und strahleninduzierten Phasenumwandlungen sowie über die Verschiebung der Umwandlungstemperaturen zwischen den Raum‐ und Hochtemperaturphasen von BaTiO 3 , PbZrO 3 und PbTiO 3 bekanntgegeben. Es wurden vorwiegend röntgenographische und kalorimetrische…
Thermal Conductivities of MgO, Al2O3, and ZrO2 Powders to 850°C. I. Experimental
Thermal conductivities were measured for extensively characterized magnesia, alumina, and zirconia powders. Thermal conductivities of the powders in dry air at atmospheric pressure were determined at volume fractions solid varying from 0.49 to 0.70 as a function of temperature from about 100° to about 850°C. Particle-…
Hydrazine complexes of cobalt(II) chloride
The reactions of cobalt(II) chloride with hydrazine, monomethylhydrazine, and 1,1-dimethylhydrazine have been studied under various conditions and the magnetic and spectral properties of the resulting complexes used for stereochemical identification. Six-co-ordinate complexes are formed by hydrazine and monomethylhydr…
Bíomedícal Polymers
One of the most exciting current fields of research is that of biomedical polymers: the replacement of various complex biological materials in the body with less complex synthetic polymers, designed to perform the function of the natural material. These may range from relatively simple “artificial” parts (such as vasc…
Color Centers in Alkali Borate Glasses Containing Cobalt, Nickel, or Copper
Abstract The absorption spectra and the magnetic moments of Co 2+ , Ni 2+ , and Cu 2+ in alkali borate glasses of various compositions and in halide‐containing glasses have been explained from the point of view of the ligand field theory. Spectra and magnetic moments are highly dependent on the composition of the base…
Dissociation energies of the alkali metal hydroxides
The standard enthalpy change of the reaction AOH(g)→A(g)+OH(g) has been measured in H2+O2+N2 flames for all alkali metals A through a procedure based upon the third law. Values obtained for ΔH°° are 101±2, 77±4, 81±2, 83±2 and 91±3 kcal/mole for A = Li, Na, K, Rb and Cs respectively.
Bestimmung der Stapelfehlerenergie kubisch‐flächenzentrierter Metalle aus der Analyse des elektronenmikroskopischen Beugungskontrastes von Stapelfehlerdipolen
Abstract In der vorliegenden Arbeit wird aus dem elektronenmikroskopischen Beugungskontrast von Stapelfehlerdipolen in verformten kubisch‐flächenzentrierten Metallen die spezifische Stapelfehlerenergie bestimmt. Der elektronenmikroskopische Beugungskontrast von Stapelfehlerdipolen wurde in Abhängigkeit von der Geometr…