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The carbon atom positions in uranium carbides have been determined from neutron diffraction data. UC is face-centered cubic with sodium chloride structure. U/sub 2C/sub 3/ is body-centered cubic with space group 14 bar 3d, and carbon atoms have one parameter of 0.295 with carboncarbon bond distance of 1.295 A. UC/sub…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThiolcarbamates. Preparation and Molar Refractions1Harry TillesCite this: J. Am. Chem. Soc. 1959, 81, 3, 714–727Publication Date (Print):February 1, 1959Publication History Published online1 May 2002Published inissue 1 February 1959https://pubs.acs.org/doi/10.1021/ja01512a05…
The conditions influencing the onset of acoustically-induced cavitation in tap water have been investigated, with special attention to the effect of air-filled cavitation nuclei. Cavitation was induced by exciting an acoustic radial mode in the water in a spherical resonator at a frequency near 25 kc/sec. Air-filled n…
A series of detailed measurements have been made of the absorption spectrum of pure vacuum grown crystals of silicon in the wavelength range 2 μ to 30 μ, and over the temperature range 20°k to 365°k. Some new absorption bands have been found, and an explanation is offered for the positions and temperature dependence o…
Abstract Many articles have been written attempting to explain the degradation processes which take place when polyvinyl chloride is aged. Everyone agrees that hydrogen chloride is evolved, color develops, and the polymer eventually becomes stiff and insoluble as a result of crosslinking. Early workers believed that h…
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Velocities of individual dislocations have been measured in LiF, covering a range of twelve orders of magnitude in velocity, from 10−7 cm/sec to 105 cm/sec. The velocity is extremely sensitive to applied stress at low velocities, and for each crystal there exists a minimum stress for dislocation motion, below which di…
An ultrasonic vibrational mode with rather well-defined properties has been set up in a cylindrical single crystal of sodium chloride. The saturation of the spin levels of ${\mathrm{Na}}^{23}$ and ${\mathrm{Cl}}^{35}$ by acoustically induced quadrupole transitions, $\ensuremath{\Delta}m=\ifmmode\pm\else\textpm\fi{}2$,…
The term “pickling” is applied to the removal from metals of scale and oxide coatings, usually resulting from heat-treatment, forging, or casting operations. The thickness, composition, and structure of the scale depend on the conditions under which it is formed. The temperature and duration of heating and the nature…
Saburo Shimodaira：On the Relation between the Work Function and the Corrosion Rate of the Metals．The relation between the thermo-ionic work function
Van Wyk's theory on the compression of a fibrous mass is refuted by the authors on the ground that it ignores the substantial thickness of a fiber. The authors' formula, which shows the theoretical relation between the pressure and volume of a compressed specimen, explains the experimental tendency of the pressure-vol…
In the present study, X-ray and chemical analyses were carried out on carbides isolated electrolytically from several high-V high speed steels, and the effect of carbon, tungsten and vanadium contents on the constitution of carbides in these steels were discussed. Carbides in high-V high speed steel are MC, M6C and M2…
Lincoln County has yielded a variety of metals and minerals: gold, coal, iron, lead, copper, zinc, fluorite, bastnaesite, gypsum, and tungsten. In addition, deposits of molybdenum, thorium, uranium, and manganese are known, although no significant production has been recorded. The White Oaks district produced almost $…
Coefficients for the diffusion of cerium in molten uranium have been measured over the temperature range 1170°–1480°C. An equation relating the diffusion coefficient with temperature is: . At 1200°C the diffusion coefficient for cerium in uranium is . An estimate of the coefficient of diffusion for zirconium in uraniu…
The equilibrium diagram for the system was established as a solid solution type by quenching and solid‐state methods. About was found soluble in at 850°C, but less than 2 mole % was soluble in at 650°C. Solid solution of in was extensive, ranging from approximately 35 to 100 mole % . The cathodoluminescence of composi…
A kinetic analysis was carried out, with a continuous flow reactor, for demethylation of toluene to yield benzene under pressures ranging from 10 to 50atm and at temperatures from approximately 580°to 680°C, while maintaining the hydrogen to toluene mole ratio constant at 4.The 1.5-order rate was confirmed in agreemen…
E. F. G. Herington, Analyst, 1959, 84, 680 DOI: 10.1039/AN9598400680