The dielectric properties of selected basalts
Abstract Dielectric constants and loss tangent (100 hz-50Mhz), composition, textures
Materials Literature
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Statistical mechanical theory of solubility
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStatistical mechanical theory of solubilityR. O. Neff and D. A. McQuarrieCite this: J. Phys. Chem. 1973, 77, 3, 413–418Publication Date (Print):February 1, 1973Publication History Published online1 May 2002Published inissue 1 February 1973https://pubs.acs.org/doi/10.1021/j10…
Heteropoly 12-metallophosphates containing tungsten and vanadium. Preparation, voltammetry, and properties of mono-, di-, tetra-, and hexavanado complexes
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHeteropoly 12-metallophosphates containing tungsten and vanadium. Preparation, voltammetry, and properties of mono-, di-, tetra-, and hexavanado complexesDorothy P. Smith and Michael T. PopeCite this: Inorg. Chem. 1973, 12, 2, 331–336Publication Date (Print):February 1, 1973…
The Nature of Garnierites —I Structures, Chemical Compositions and Color Characteristics
Abstract X-ray diffraction patterns of garnierites indicate that most samples resemble serpentine-group minerals or a talc-like mineral, or a mixture of these forms, and give respectively 7 Å and 10 Å basal reflections. From a survey of some 40 garnierites, four of predominantly serpentine type and seven of predominan…
Dynamic yield, compressional, and elastic parameters for several lightweight intermetallic compounds
Dynamic yield strengths, compression data under uniaxial shock-wave loading, and sonic velocities at 1 bar are reported for polycrystalline TiB2, SiC, Be4B, Be4B+8 wt% BeO, Be2B, AlB12, TiBe12, and ZrBe13. Hugoniot elastic limits were measured as 86, 80, 74, 77, 65, 87, 53, and 71 kbar, respectively. Evidence of phase…
4—THE FINITE-DEFORMATION THEORY OF PLAIN-WEAVE FABRICS. PART II: THE UNIAXIAL-DEFORMATION THEORY
The uniaxial tensile deformation of a fabric is analysed as a special case of the biaxial theory presented in Part I, and the bending rigidity of the yarn at right angles to the tensile direction is introduced. The structural model presented in Part I is used again to solve the uniaxial case. The biaxial-deformation t…
Reactions of monomeric cobalt-oxygen complexes. I. Thermodynamics of reaction of molecular oxygen with five- and six-coordinate amine complexes of a cobalt porphyrin
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReactions of monomeric cobalt-oxygen complexes. I. Thermodynamics of reaction of molecular oxygen with five- and six-coordinate amine complexes of a cobalt porphyrinF. Ann. WalkerCite this: J. Am. Chem. Soc. 1973, 95, 4, 1154–1159Publication Date (Print):February 1, 1973Publ…
5—THE FINITE-DEFORMATION THEORY OF PLAIN-WEAVE FABRICS. PART III: THE SHEAR-DEFORMATION THEORY
The over-all shear deformation, that is, the combined deformation of biaxial tensile and shear deformation is considered generally, and a theory by which the mechanical behaviour of fabrics in this slate can be determined is presented. Experiments are also described that were made to confirm the accuracy of these theo…
Electronic conduction and switching in chalcogenide glasses
Evidence for electronic conduction in the preswitching region of chalcogenide glasses is outlined and discussed in terms of several simple models. Electronic processes likely to contribute to the switching process itself are reviewed and compared, where possible, with the predictions of relevant models from convention…
Distribution and nature of incorporation of trace elements in modern aragonitic corals*
ABSTRACT The objective of this study is to locate as closely as possible the sites of strontium, magnesium, sodium, and potassium in modern aragonitic corals, specifically whether these cations are adsorbed, or are substituted in the carbonate lattice or are incorporated in organic components. In addition to locating…
Fabrication of Transparent Electrooptic PLZT Ceramics by Atmosphere Sintering
PLZT electrooptic ceramics were fabricated by a unique atmosphere sintering technique. The ceramics produced were significantly more transparent than those obtained by ordinary O 2 sintering methods; in fact, they were comparable in transparency to those obtained by hot‐pressing. To achieve good transparency, the powd…
Transmission electron microscope studies of point defect clusters in fcc and bcc metals
Reviews the contribution that transmission electron microscopy has made to the understanding of the mobility and clustering of point defects in fcc and bcc metals. The first part of the paper considers the nucleation and growth of vacancy clusters in quenched fcc metals. In the second part the complex subject of irrad…
Infrared Reflectivity and Raman Scattering of Mg2SiO4 Single Crystal
Abstract The lattice vibrations of Mg 2 SiO 4 forsterite single crystal have been studied using infrared and Raman techniques. The site symmetry method allows to study the degeneracy lifting of the silicate ion vibrational levels and to assign the modes of vibration (45 infrared active modes and 36 Raman active modes)…
Pressure and Temperature Dependence of the Static Dielectric Constants and Raman Spectra of TiO2(Rutile)
The effects of temperature [(4-500)\ifmmode^\circ\else\textdegree\fi{}K] and hydrostatic pressure (0-4 kbar) on the static dielectric constants ${\ensuremath{\epsilon}}_{a}$ and ${\ensuremath{\epsilon}}_{c}$ and on the frequencies of the four Raman-active phonons ${B}_{1g}$, ${E}_{g}$, ${A}_{1g}$, and ${B}_{2g}$ of si…
Amorphous semiconductors for switching, memory, and imaging applications
Performance and reliability of amorphous semiconductor devices that deal with the handling of information in the form of switching, modulation, storage, and display are discussed. Structural changes between a disordered and a more ordered state and the concomitant large change in many material properties offer the pos…
On the existence of even indexed disclinations in nematic liquid crystals
The stability of cylindrically symmetrical line disclinations is examined by continum theory calculations and topological arguments, to show that these singularities can almost always be replaced by a continuous structure of lower energy. The calculations are applied to the four basic types of index ± 2 structures. Ex…
The theory of diffuse X-ray scattering and its application to the study of point defects and their clusters
The theory of the diffuse scattering by point defects and by defect clusters is reviewed. For a small concentration of statistically distributed point defects the symmetry of the long ranging part of the displacement field and the strength of the defects can be obtained from scattering measurements close to the recipr…
An Electron-microscopic Demonstration of an Acidic Polysaccharide Involved in the Adhesion of a Marine Bacterium to Solid Surfaces
SUMMARY: Staining a marine bacterium with Ruthenium Red and Alcian Blue demonstrated an extracellular, compact acidic polysaccharide layer, which was involved in bacterial adhesion to surfaces. The adhesive substance was present on suspended bacteria and appeared to assist adhesion when they were forced into contact w…
Effects of Grain Size and Porosity on Electrical and Optical Properties of PLZT Ceramics
A group of transparent ferroelectric hot‐pressed (Pb 0.92 La 0.08 )‐(Zr 0.65 Ti 0.35 ) 0.98 O 3 specimens with controlled grain size and constant porosity and a group of similar specimens with controlled porosity and constant grain size were prepared. The electrical and optical constants and polarization‐reversal prop…
A neutron diffraction determination of the crystal structure of α-phase potassium nitrate at 25 degrees C and 100 degrees C
The structure of alpha -phase potassium nitrate (KNO 3 ) has been determined at room temperature (25 degrees C) and closer to the alpha to beta transition temperature at 100 degrees C, from three-dimensional neutron diffraction data. The present results indicate that the potassium atoms experience small but significan…