Oleum solutions. Part 1.—The heat of fusion of disulphuric acid and other thermal measurements
B. Dacre and P. A. H. Wyatt, Trans. Faraday Soc., 1961, 57, 1281 DOI: 10.1039/TF9615701281
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Thermal Conductivities of Mono-carbides in Transition Metals
The thermal conductivities of the mono-carbides having NaCl type structure in several transition metals of the fourth and fifth groups on the periodic chart were measured at 0°C and at the liquid-oxygen temperature. For these substances, larger conductivity by lattice than those by conduction electrons is concluded fr…
Determination of Accurate Lattice Parameters Using a Diffractometer
Abstract Without modifying the General Electric XRD-5 diffractometer accurate lattice parameters of cubic structures may be determined quite simply and precisely. The method is applicable to both solid and powder samples and gives a precision of at least ±0.00025 A. The most important step in the analysis is the align…
Reactivity of lime and related oxides. VI. crystal changes in carbonatated lime at different temperatures
Abstract The ‘wet’ carbonatation of calcium hydroxide has been compared at 22° and 95° to determine the effect of temperature on the rate of formation, solubility and subsequent rate of ageing of the products, as indicated by changes in lattice structure and in surface area and average crystallite size. Direct precipi…
Preparation of Metal Surfaces for Adhesive Bonding
Procedures for the preparation of aluminum, stainless steel, and magnesium for adhesive bonding have been developed, together with illustrative data showing the reliability of results. The lap joint shear test at room temperature was used as the criterion. The testing procedures, equipment used, and process variables…
The effect of sulphur dioxide on the combustion of some inorganic compounds. Part 2.—The nitric oxide+sulphur dioxide+oxygen system
C. F. H. Tipper and R. K. Williams, Trans. Faraday Soc., 1961, 57, 79 DOI: 10.1039/TF9615700079
The melting mechanism of the alkali thiocyanates
The melting of a solid always implies a transition from a state of com-paratively high order to one of comparative disorder. A measure of the increase of disorder or randomization on melting is given by the Boltzmann relationship
The relation of structure to some physical and mechanical properties of poly(vinyl alkyl ethers)
Abstract The preparation of a homologous series of eighteen poly(vinyl alkyl ethers) by cationic solution polymerization is reported. Physical and mechanical properties of the polymer were found to be highly dependent on the size or bulkiness of the alkyl side chain. Thus, poly(vinyl alkyl ethers) having highly branch…
Oxidation of Copper between 250° and 450°C and the Growth of CuO “Whiskers”
Thin oxide whiskers have been found to grow on copper by a number of investigators. The relation of these growths to the mechanism of oxidation and to changes in the kinetics of oxidation remains to be established. To answer these questions a study was made of the oxidation of copper using the vacuum microbalance meth…
Study of the Wurtzite-Type Compounds. V. Structure of Aluminum Oxycarbide, Al2CO; A Short-Range Wurtzite-Type Superstructure
Al2CO has a long-range disordered structure based on the wurtzite lattice and a short-range √3a, 2c superstructure. The long-range atomic parameters were determined from the single crystal sharp diffraction data with Mo K radiation. The diffuse spectra, although very apparent on the single-crystal x-ray photographs, w…
29. Photochromism in some spiropyrans. Part III. The extent of phototransformation
R. Heiligman-Rim, Y. Hirshberg and E. Fischer, J. Chem. Soc., 1961, 156 DOI: 10.1039/JR9610000156
Über polyamide aus heterocyclischen dicarbonsäuren
Abstract Aus 21 heterocyclischen Dicarbonsäuren wurden lineare Polyamide hergestellt. Kondensationen durch Schmelzen von Hexamethylendiammoniumsalzen waren ungünstig, da die Produkte decarboxylierten, während Kondensationen über Ester etwas bessere Resultate gaben. Einige Salze ließen sich überhaupt nicht kondensieren…
Differential Thermal Analysis and Thermogravimetric Analysis of Fission Product Oxides and Nitrates to 1500° C.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDifferential Thermal Analysis and Thermogravimetric Analysis of Fission Product Oxides and Nitrates to 1500° C.P. F. Campbell, M. H. Ortner, and C. J. AndersonCite this: Anal. Chem. 1961, 33, 1, 58–61Publication Date (Print):January 1, 1961Publication History Published onlin…
Optical and electrical effects of radiation damage in diamond
C. D. Clark, P. J. Kemmey and E. W. J. Mitchell, Discuss. Faraday Soc., 1961, 31, 96 DOI: 10.1039/DF9613100096
Contact angles; wetting and de‐wetting of mercury: Part I. A critical examination of surface tension measurement by the sessile drop method
Abstract A survey is given of the existing methods for measuring the surface tension from the geometry of sessile drops. These methods, which generally consist of the measurement of simple drop dimensions, are insufficiently accurate for use with adsorption studies. A new procedure is described to find the surface ten…
An Electrometric and Electron Diffraction Study of Air-Formed Oxide Films on Iron
Oxide films formed at room temperature on iron single crystals and poly‐crystals have been investigated by electron diffraction and electrochemical methods. The structure of the oxide is found to vary from an Fe 3 O 4 type material at the metal/oxide interface to a γ ‐ Fe 2 O 3 type material at the oxide/gas interface…
149. The structure of “cyclopropane platinous chloride”
D. M. Adams, J. Chatt, R. G. Guy and N. Sheppard, J. Chem. Soc., 1961, 738 DOI: 10.1039/JR9610000738
Phase Equilibria and Tin-Activated Luminescence in Strontium Orthophosphate Systems
Strontium orthophosphate undergoes a rapid, reversible transition at 1305°C. The high‐temperature β form of pure Sr 3 ( PO 4 ) 2 cannot be quenched to room temperature, even with extremely rapid cooling. Determination of phase relationships on the orthophosphate joins between Sr 3 ( PO 4 ) 2 and each of the three orth…
Corrosion and Electrochemical Behavior of Chromium-Noble Metal Alloys
Alloying chromium with small amounts of platinum, palladium, iridium, rhodium, ruthenium, or osmium markedly improves its corrosion resistance to nonoxidizing acids such as sulfuric or hydrochloric acid. The presence of rhodium, palladium, or osmium has little influence on the resistance of chromium to an oxidizing ac…
Élargissement et déplacement des raies de résonance magnétique causés par une excitation optique
L'effet global des processus d'absorption et d'émission de photons de résonance optique sur l'état fondamental d'un ensemble d'atomes est étudié à partir d'équations d'évolution établies précédemment. On met ces équations sous une forme plus simple grâce à une « approximation séculaire», toujours valable dans les cas…