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The present status of our knowledge of the structure of the spectra of the doubly and triply ionized spectra of the rare earths is derived partly from experimental data of the emission spectra of the free ions which provide the energy level scheme in great detail but are difficult and laborious to analyze. For the low…
Abstract Three-dimensional neutron structure factors have been measured on single crystals grown from the melt and from solution. The Bragg reflexions divide into three groups, strong, medium and weak: the strong and medium reflexions are affected by extinction, which is particularly severe for solution-grown crystals…
Abstract The mean-square thermal displacements of the atoms in U 0 2 and T h 0 2 have been determined as a function of temperature from the analysis of two-dimensional diffraction data. In the range investigated, 20 to 1100°C, the oxygen atoms vibrate more strongly than the metal atoms and at each temperature the disp…
Investigations of the primary energy dependence of the rate of production of secondary electrons by relativistic primary electrons, and of the nature of the secondary energy distributions, were conducted. The "sandwich" arrangement, characterized by the feature that the primary beam is essentially monoenergetic while…
The theoretical equations of Inokuti of the preceding paper are applied to the interpretation of data obtained during the irradiation of isotactic and atactic polypropylene, and poly-(1-pentene) and poly-(1-hexene). Inokuti's modified Charlesby—Pinner function calculated for initial values of the Mw/Mn ratio greater t…
Magnetostriction along the axes in Dy and Ho was measured in magnetic fields up to 26 kgauss and parallel to the plane of the metal disks. Maximum linear strains ( DELTA l/l) of 7500 x 10/sup -6/and 3500 x 10/sup -6/ were observed for Dy and Ho, respectively. Strain dependence on magnetic field strength for both metal…
A detailed three-dimensional refinement of the structure of hexagonal silver iodide from room-temperature photographic data showed very little deviation from the ideal wurtzite-type structure. Using anisotropic temperature factors a final R value of 6.6% was obtained. The space group is P63mc, a=4.592, c=7.510, c/a=1.…
A unique crystalline phase was the sole constituent in newly opened containers of commercial reagent-grade "ammonium carbonate." The chemical composition, optical constants, x-ray powder diffraction pattern, infrared absorption spectrum, and density indicate a double salt, ammonium bicarbonate-carbamate (NH(4)HCO(3).N…
Abstract It was suspected that the brittleness of copper-antimony alloys is partly due to a low surface energy caused by segregation of antimony to interfaces in the Gibbs manner. In these experiments the surface and grain-boundary energies and the surface segregation were measured on pure copper and copper alloys con…
Single crystals of the three polymorphs of CaGa 2 O 4 reported by Jeevaratnam and Glasser 1 have been studied. CaGa 2 O 4 -I is orthorhombic, with a = 7.73, b = 9.14, c = 10.36 Å; CaGa 2 O 4 -II is orthorhombic with a = 5.32, b = 14.38, c = 16.82 Å; m -CaGa 2 O 4 is monoclinic with a = 7.86, b = 8.90, c = 10.55 Å, β =…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation of Metallic Thorium DiiodideRonald J. Clark and John D. CorbettCite this: Inorg. Chem. 1963, 2, 3, 460–463Publication Date (Print):June 1, 1963Publication History Published online1 May 2002Published inissue 1 June 1963https://doi.org/10.1021/ic50007a008Request re…
A reliable and accurate method of determining metal dissolution rates in a relatively short time is much needed in studies of corrosion inhibition. Weight-loss determinations on specimens supply only average rate data over the interval of the test. Rate determinations by chemical analysis of the corrosive environment…
Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text Lily Ho and C. F. Buhrer, "Electro-Optic Effect of Gallium Arsenide," Appl. Opt. 2, 647-648 (1963) Export Citation BibTex Endnote (RIS) HTML Plain Text…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCopper(II) Bromide Complexes. II. A Discussion of the Tetrabromocuprate(II) Spectrum.P. S. BratermanCite this: Inorg. Chem. 1963, 2, 3, 448–452Publication Date (Print):June 1, 1963Publication History Published online1 May 2002Published inissue 1 June 1963https://pubs.acs.org…
Techniques for the fabrication of polycrystalline LiF test specimens were developed and evaluated using single‐crystal LiF as a control. An etch was developed which revealed dislocations on all crystallographic faces of LiF. Large‐grained polycrystalline specimens tested in four‐point loading underwent 0.076 to 0.798%…
The secondary electron coefficient γ has been measured for singly charged hydrogen, helium, nitrogen, neon, oxygen, argon and krypton ions in the energy range 10-140 keV incident on a tungsten surface. Measurements have been made within the monolayer adsorption time (similar 5 min) after production of an atomically cl…
Abstract The kinetics of isothermal crystallization and morphology of spherulites of nylon 6 nucleated by additives were discussed. Nylon 66, polyethylene terephthalate, and some inorganic phosphor compounds were used as nucleating agents. At crystallization temperatures in the range of 205 to 180°C., crystallization…
Manganite is monoclinic, pseudorhombic. Its structure is a superstructure based upon the marcasite type. The crystals show polysynthetic twinning. By x-ray measurements on a thin untwinned cleavage splint improved Mn parameters were obtained. For the neutron investigations twinned crystals had to be used. Because of t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrical and Magnetic Properties of Potassium Tungsten Bronze and Rubidium Tungsten BronzeM. J. Sienko and Sheila MacEnness MorehouseCite this: Inorg. Chem. 1963, 2, 3, 485–489Publication Date (Print):June 1, 1963Publication History Published online1 May 2002Published inis…
The linewidth of polycrystalline ferrites has been calculated from the dipole narrowing theory including both anisotropy and porosity effects. It is shown that porosity broadening is successfully accounted for and that porosity is the dominant line broadener even in very dense ferrites. The temperature dependence of t…