Materials Literature
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The Hall mobility, thermoelectric power, magnetoresistance and optical absorption coefficient of Mg x Pb 1− x Te alloys with 0less-than-or-eq, slant x less-than-or-eq, slant0·06 have been measured at temperatures within the range 77 to 450 K. It has been found that alloying PbTe with MgTe increases the direct energy g…
The Hall mobility and thermoelectric power of n- and p-type Cd x Pb 1− x Te alloys with x = 0·03, 0·06 and 0·11 have been measured at temperatures within the range 77 to 450 K for carrier concentrations within the range 10 16 to 10 20 cm −3 . The results have been interpreted using a two valence band model. The energy…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT1,2-Dithiolene complexes of ruthenium and ironA. L. Balch and Joel MillerCite this: Inorg. Chem. 1971, 10, 7, 1410–1415Publication Date (Print):July 1, 1971Publication History Published online1 May 2002Published inissue 1 July 1971https://pubs.acs.org/doi/10.1021/ic50101a019…
To better determine the optical properties of the rare-earth oxysulfide phosphors and to lay the foundation for their application in single-crystal form as scintillators and lasers we have grown, for the first time, single crystals of these materials. A description of present growth techniques will be presented. Mater…
Th e refrac tiv e indi ces of a commercia l fu sed silica s pec im e n were de termin ed at ten wa ve len gth s from 404.7 to 667.8 nm over the tempe ra ture range from -200 to + 20 C. Th e data a re neede d for th e des ign o f optical sys te ms for s pace app lication s wh e re th e e xtrem es of te mpe rat ure are…
Polyethylene single crystals attached to a copper substrate were plastically deformed at −196°C and 20°C. Slip lines were observed at all temperatures on the surface of the crystals. The observations suggest that plastic deformation in polyethylene crystals may occur by crystallographic slip due to the movement of dis…
The effect of gain variation on the integrated output-charge distribution of a photomultiplier tube is investigated experimentally and shown to be a predictable function of the multiplier single-electron response. Standardized or nonstandardized pulses recorded using either capacitive or digital storage are considered…
Abstract The effects of polymer molecular weight, molecular weight distribution, and orientation on the rate of relaxation‐controlled sorption of n‐pentane by glassy polystyrene were studied. The sorption follows Case II kinetics but for films which sorb slowly the sorption rate increases at relatively long times unti…
A revision of the family Nitrobacteraceae Buchanan is proposed. It is requested that the Judicial Commission issue an Opinion placing the generic names Nitrosocystis Winogradsky, Nitrosogloea Winogradsky, and Nitrocystis Winogradsky on the list of rejected names as nomina dubia. Organisms currently placed in these gen…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal and molecular structure of tris(glycinato)chromium(III) monohydrate, Cr(C2H4NO2)3.H2ORobert F. Bryan, Peter T. Greene, Peter F. Stokely, and Edmond W. Wilson Jr.Cite this: Inorg. Chem. 1971, 10, 7, 1468–1473Publication Date (Print):July 1, 1971Publication History Pub…
In ${\mathrm{Y}}_{2}$${\mathrm{O}}_{2}$S: Eu and ${\mathrm{La}}_{2}$${\mathrm{O}}_{2}$S: Eu, excitation into the charge-transfer states (CTS) of ${\mathrm{Eu}}^{+3}$ leads partially to the dissociation of the CTS into ${\mathrm{Eu}}^{+2}$ and a free hole which may subsequently be trapped. The extent of CTS dissociatio…
Abstract Mit Hilfe papierchromatographischer, kinetischer und röntgenographischer Methoden wird gezeigt, daß das Tetramethylammoniumsilicat der Zusammensetzung 1 N(CH 3 ) 4 OH · 1 SiO 2 · ∼8 H 2 O nicht – wie bisher angenommen – ein Poly‐ oder Phyllosilicat, sondern ein Tetra‐anhydrido‐bis‐cyclotetrasilicat (Doppelvie…
A refinement of the structure of anorthite has been completed on crystals from Val Plasmeda, Tyrol, Austria. Atomic parameters and significant bond lengths and angles are reported. The residual error index R is 6.0°/o.
Abstract Clay beds 1–2 m thick and interbedded with marine limestones probably of early Eocene age are composed of nearly pure mixed-layer kaolinite-montmorillonite. Particle size studies, electron micrographs, X-ray diffraction studies, chemical analyses, cation exchange experiments, DTA, and TGA indicate that clays…
Abstract The rate of gel formation and color formation in poly(hexamethylene adipamide), nylon 66, is found to be dependent upon the rate of removal of the volatile products of degradation. If a sample of nylon is heated above its melting point in a sealed tube, the material will remain soluble for extended periods of…
The Dzialoshinsky-Moriya (DM) antisymmetric exchange interaction between superexchange-coupled ions in antiferromagnetic salts is shown to contribute to the exchanged-narrowed electron-paramagnetic-resonance (EPR) linewidth in the paramagnetic state. The contribution of antisymmetric exchange to the second and fourth…
Transient nuclear spin-lattice relaxation measurements have been made in indium metal and the InCd, InTl, InSn, and InPb dilute alloy systems, using the ${\mathrm{In}}^{115}$ nuclear-quadrupole-resonance (NQR) spectrum. The theory of spin-lattice relaxation in NQR is described for both magnetic and quadrupolar contrib…
Previous work on the rapid formation of a hydride of SmCo5 at room temperature is confirmed. It is shown that the rate of release of hydrogen is related to the rate of transformation of the hydride to the unhydrided compound, rather than by bulk diffusion of hydrogen. The rate-controlling step is probably the allotrop…
Hole concentration of CuI thin film decreased but Hall mobility increased with the rise of reaction temperature of copper films with iodine vapor. The heat-treatment of CuI film in vacuum brings out the decrease of hole concentration because of the escape of excess iodine from the film. Oxygen diffuses into the bulk o…
Tensile and four-point bend tests on specimens of polycrystalline copper – 8 wt% aluminum coated with mercury have shown that plastic deformation is a necessary precursor to intergranular fracture. The existence of long cracks associated with unfailed notches indicates that a period of stable crack growth precedes fai…