Neutron diffraction study of α-iron titanium deuteride
It is shown that in FeTiD 0.057 ( alpha phase), deuterium occupies octahedral sites with iron atoms as nearest neighbours.
Materials Literature
文献浏览
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Intensities of spin‐forbidden transitions in molecular oxygen and selective heavy‐atom effects
Abstract Intensities of a 1 Δ g ← X 3 ∑ g − and b 1 ∑ g + ← X 3 ∑ g − transitions in molecular oxygen have been calculated on the basis of the INDO method taking into account spin‐orbit coupling by perturbation theory. The transitions are magnetic dipole in nature. The first of them ( a − X ) steals its intensity from…
The Oxidation of Soot Deposits from Diesel Engines
<div class="htmlview paragraph">Combustion and gasification characteristics of deposits from diesel exhaust were investigated. Properties which may influence soot reactivity, such as morphology, specific surface area, organic adsorbate, and occlusions of inorganic origin were characterized. Effects of temperatur…
Thermal Decomposition Process of HMX
Abstract The thermal decomposition of HMX has been investigated using thermoanalytical techniques and infrared spectroscopic study at both above and below its melting point. The weight loss phenomenon that occurs as the temperature is elevated at a constant heating rate has been clearly separated into four elementary…
Cell Expansion Patterns and Directionality of Wall Mechanical Properties in Nitella.
As a means of assessing the extent to which deformation of isolated walls relates to in vivo cell expansion, the directionality of wall mechanical properties was examined in Nitella. Measurements were made of plastic and elastic deformation and creep under both uniaxial and multiaxial stress conditions. Walls of diffe…
Experimental mineral/liquid partition coefficients of the rare earth elements (REE), Sc and Sr for perovskite, spinel and melilite
Experimental determinations of the mineral/liquid partition coefficients of REE (La, Sm, Eu, Gd, Tb, Yb and Lu), Sc and Sr are reported for the minerals perovskite, spinel and melilite in synthetic systems. Perovskite concentrates light REE with respect to the residual liquid but shows no preference for heavy REE. Spi…
Structure determination of LixTiS2 by neutron diffraction
The crystal structures of the intercalation compounds of Li x TiS 2 are investigated by neutron diffraction for x = 0.12, 0.33, 0.67, and 1.0. The Li atoms are shown to preferentially occupy the octahedral sites in the van der Waals gaps of the host TiS 2 lattice for all values of x and no evidence for three-dimension…
Mean free path for inelastic scattering of 1.2 kev electrons in thin poly(methylmethacrylate) films
Abstract Mean free paths for inelastic scattering (λ) of low energy electrons in poly(methylmethacrylate) (PMMA) have been determined by measuring Al Kα excited C 1s and Si 2s photoelectron signal intensities as a function of ellipsometrically determined thicknesses of PMMA overlayers on silicon substrates. The λ valu…
Bubble Effects on the Solution IR Drop in a Vertical Electrolyzer Under Free and Forced Convection
Effects of electrolytic bubbles on the IR drop of caustic soda solution in a vertical cell of one meter height were studied under both free and forced convection. Three pairs of Luggin‐Haber probes were positioned near the anode and the cathode to determine the solution IR drop during electrolysis. A sectioned electro…
Static compression of silicon in the [100] and in the [111] directions
High pressures were generated using a diamond indentor technique. The phase transition in silicon loaded in the [100] direction and silicon loaded in the [111] direction under high pressure was studied. From the behavior of electrical resistance of silicon loaded in the [100] direction, it was found that it becomes me…
Morphological studies on polybutylene terephthalate
Abstract The morphology of poly(butylene terephthalate) (PBT) crystallized from the melt at various temperatures was studied by small‐angle light scattering, polarizing microscopy, and wide‐angle x‐ray diffraction. Spherulites with a maltese cross at 45° to the polars formed at lower temperatures while spherulites hav…
Electrical and optical properties of n-type semiconducting chalcogenide glasses in the system Ge-Bi-Se
The glass-forming region was determined for the system Ge-Bi-Se; 13 at.% Bi was found to be incorporated at its maximum content into glasses, the Ge content of which was 20 at.%. Electrical resistivity, thermoelectric power, and optical absorption coefficient were measured mainly on a series of Ge20BixSe80−x glasses (…
Differential scanning calorimetry analysis of morphological changes in segmented elastomers
Abstract Investigations of morphological changes which are induced in segmented elastomers by annealing and quenching are reported. Four different polymers were studied each based on the same soft segment—1000 or 2000 molecular weight poly(tetramethylene oxide). The hard segments were 4,4′‐diphenylmethane diisocyanate…
Formation Mechanism of Porous Silicon Layer by Anodization in HF Solution
The mechanism of formation of porous silicon layer (PSL) has been studied according to the following experimental results. PSL is formed by the local dissolution of silicon which occurs only at the base of the pores. The concentration of the electrolyte in the pores of PSL is constant during anodization and the anodic…
Resonance Raman Scattering from Neutral and Doped Polyacetylene
Abstract A complete assignment for the modes obtained from resonance Raman scattering on cis‐ and trans‐polyacetylene is reported. The Raman lines in the cis‐isomer indicate a well expressed one dimensional behaviour of the chain. From the line profile and line position of the resonance enhanced CC stretch modes in t…
Summary of recommendations of AIPEA Nomenclature Committee on clay minerals
Because of their small particle sizes and v~riable degrees of crystal perfection, it is not surprisi4g that clay minerals proved extremely difficult to characterize adequately prior to the development of ~odem analytical techniques. Problems in charactetization led quite naturally to problems in nomenclatute, undoubte…
Optical Crystallography
"Optical Crystallography." Optica Acta: International Journal of Optics, 27(2), p. 145
Porphyrins. 40. Electronic spectra and four-orbital energies of free-base, zinc, copper, and palladium tetrakis(perfluorophenyl)porphyrins
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPorphyrins. 40. Electronic spectra and four-orbital energies of free-base, zinc, copper, and palladium tetrakis(perfluorophenyl)porphyrinsP. J. Spellane, M. Gouterman, A. Antipas, S. Kim, and Y. C. LiuCite this: Inorg. Chem. 1980, 19, 2, 386–391Publication Date (Print):Febru…
Electrostrictive effect in lead magnesium niobate single crystals
Transverse and longitudinal elastic strain have been measured for electric fields applied along the 〈100〉 direction in single crystals of lead magnesium niobate [Pb(Mg1/3Nb2/3)03], using a bonded strain gauge technique. A quadratic electrostrictive relation holds between induced elastic strain and electric polarizatio…
The determination of diffuse-boundary thicknesses of polymers by small-angle X-ray scattering
Thermal density fluctuations within phases and finite interphase widths lead to systematic deviations from Porod's law. The validity of present methods used to analyze these deviations and determine diffuse-boundary widths is determined. In view of the inadequacies found in these methods, a simple yet accurate method…