Materials Literature
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Abstract A great number of bands have been observed by light scattering and infrared absorption in Cu 2 O crystals corresponding to transitions most of which are normally forbidden in the perfect crystal. An analysis of the symmetry properties of the lattice modes in the presence of defects is given. In particular the…
Abstract The silver complexes of various thiols of low molecular weight have been studied by amperometric and spectrophotometric titrations. Cysteine and cysteamine form complexes with silver containing up to 1.5 Ag + /—SH. The ligands participating in the binding of silver are the —SH and amino groups. Under some con…
The high‐temperature thermal expansion of monoclinic Nb 2 O 5 was studied with X‐ray and dilatometric techniques. The X‐ray axial thermal expansion was anisotropic; the mean coefficients in the a, b , and c directions, respectively, were 5.3, 0, and 5.9×10 −6 °C ‐1 from room temperature to 1000°C. It is proposed that…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTX-ray photoelectron spectroscopy of some nickel dithiolate complexesSamuel O. Grim, Luis J. Matienzo, and William E. Swartz Jr.Cite this: J. Am. Chem. Soc. 1972, 94, 14, 5116–5117Publication Date (Print):July 1, 1972Publication History Published online1 May 2002Published ini…
Agricultural Research Department, Danish Atomic Energy Commission Research Establishment RisØ, DK-4000 Roskilde, Denmark
The title of these lectures reflects the intent more strongly than the content of them. For while we are particularly interested in how the s-f interaction appears differently in magnetic semiconductors than in metals, in which it has been studied extensively, it seemed necessary after the first lecture on the metals…
Abstract Rotational molding is a process by which powdered or liquid plastics are converted into hollow articles. This paper is devoted to the theoretical understanding of the process of rotational molding. There are seven sections: The Art , wherein we describe the process, discuss previous attempts at understanding…
This paper describes studies of the effects of conducting particles on breakdown phenomena in compressed SF6 under alternating voltage conditions. Results with free particles of different shapes and materials are compared with those obtained with fixed particles for both parallel-plane and coaxial electrode geometrics…
A many-beam dynamical theory, which apporoximately takes into account multiple inelastic scvattering, has been formulated and used to calculate the intensity of electrons backscattered from perfect and imperfect crystals. The contrast of channelling pattern lines is discussed, and the occurrence of ‘missing’ lines is…
A model is proposed to explain the phenomenon of electrode “polarization” in glasses containing alkali oxides. The application of a dc potential to Pt electrodes on an alkali‐containing glass causes a large electric field to develop in the immediate vicinity of the anode. This high‐field region is formed by local diss…
The equations governing the linearized hydrodynamics of cholesteric liquid crystals are systematically deduced. They are valid for compressible as well as incompressible cholesterics and for arbitrary direction of mode propagation. The variables which contribute to the hydrodynamics are the conserved variables, mass d…
A giant pulse of a ruby laser is focused into water, silicone oils, and some other liquids. High-speed photography of the focal region with picture repetition rates up to 850 000 pps shows the dynamics of the produced bubbles. These are extremely well suited to study cavitation bubble dynamics. Spherical almost empty…
A refined set of atomic coordinates and temperature parameters have been obtained for stibnite, Sb 2 S 3 . This structure contains parallel (Sb 4 S 6 ) n chains, which are linked to form crumpled sheets (two per unit cell). The quinvalent Sb has fivefold coordination in a square pyramid, where the Sb is slightly displ…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of the Solvent on Polymer Incompatibility in SolutionL. Zeman and D. PattersonCite this: Macromolecules 1972, 5, 4, 513–516Publication Date (Print):July 1, 1972Publication History Published online1 May 2002Published inissue 1 July 1972https://pubs.acs.org/doi/10.1021/…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and Characterization of Four-Branched Star PolystyreneJ. E. L. Roovers and S. BywaterCite this: Macromolecules 1972, 5, 4, 384–388Publication Date (Print):July 1, 1972Publication History Published online1 May 2002Published inissue 1 July 1972https://pubs.acs.org/…
The motion of space charge initially located at the free surface of an insulator is studied as a function of time. Analytic results are given for the following cases: (a) mobility proportional to a power of the field; (b) mobility proportional to a power of the free-carrier concentration; and (c) fast deep trapping wh…
Optical absorption and emission intensities are investigated for trivalent holmium ions in crystals of LaF3 and YAlO3. Oscillator strengths of transitions to all levels up to 40 000 cm−1 were measured from absorption spectra recorded at 300°K. Corresponding oscillator strengths for transitions between J manifolds were…
Magnetism has been a topic of study since the ancient times of science. Judging by the number of papers appearing each year, the group of scientists concerned with the properties of magnetic materials is vastly expanding. The reason for the great interest in this field is not only the wide application which these mate…
The characteristics of glasslike transitions in supercooled liquids and plastic crystals are discussed and a nearest neighbor interaction scheme, termed the ``bond lattice'' model, is proposed to account for the thermodynamic aspects of the phenomenon. Although the excitations of the bond lattice have features in comm…
Abstract The influence of annealing processes on the thermal behavior of organic glasses in the glass‐transition interval has been investigated and analyzed quantitatively. In detailed annealing studies of atactic polystyrene and Aroclor 5460, the absorption of thermal energy superposed on the increase in the specific…