Materials Literature
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Computer-simulation studies of the motion of a straight screw dislocation in a bcc crystal were performed. It was observed that a dislocation running with the speed near the shear wave velocity formed a microtwin without a pole mechanism.
Chemical preparations and crystal data are described for five new tetrametaphosphates: CaK2P4O12, PbK2P4O12, PbRb2P4O12, Pb(NH4)2P4O12 and PbTl2P4O12. All of them are tetragonal and isotypic with SrK2P4O12. The space group is I\bar 4 with Z = 2.
Abstract A critical survey of the published theoretical and experimental approaches to diffusion in liquids is presented. A study of the effects of temperature and viscosity demonstrates that the Stokes — Einstein equation and other relations derived from the hydrodynamic theory can only be applied in special cases. C…
A Ruderman-Kittel interaction between magnetic ions is assumed and the defect is represented by a change in the hopping integral of the conduction electrons. If the hopping integral across the defect is substantially larger than the perfect crystal value, the direction of magnetization reverses across the defect. This…
Low order electron diffraction intensity is sensitive to the electron state of a crystal. Based on this fact, an electron diffraction study has been made to determine the electron state of the ferrimagnetic interstitial compound Mn 4 N by measuring its low order superstructure reflection intensities from polycrystalli…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and properties of the solid solution series zinc iron phosphorus trisulfide (Zn1-xFexPS3) (0 .leq. x .leq. 1)Jean P. Odile, John J. Steger, and Aaron. WoldCite this: Inorg. Chem. 1975, 14, 10, 2400–2402Publication Date (Print):October 1, 1975Publication History P…
Neutron small-angle scattering in polycrystalline Al–Mg alloys aged nine months at 0°C has revealed the existence of Guinier–Preston zones in an Al–11.5% Mg alloy, but no G. P. zones in an Al–7% Mg alloy. The evaluation of the data for the 11.5% Mg alloy gives the following parametric values: mean radius of the zones,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics of the Activated Carbon-Steam ReactionHerbert E. Klei, James Sahagian, and Donald W. SundstromCite this: Ind. Eng. Chem. Process Des. Dev. 1975, 14, 4, 470–473Publication Date (Print):October 1, 1975Publication History Published online1 May 2002Published inissue 1 O…
The semi-continuum model of the lattice dynamics of layer crystals devised by Komatsu for application to graphite is here applied to hexagonal boron nitride. It is found that the thermal expansion coefficient αc parallel to the hexagonal axis is determined almost completely by the out-of-plane acoustic vibrational mod…
Thomas A. Carlson, The Nature of Secondary Electrons Created as the Result of Electron Shake-Off and Vacancy Cascades, Radiation Research, Vol. 64, No. 1, Symposium on the Distribution of Secondary Electrons from Ionizing Collisions (Oct., 1975), pp. 53-69
A six-dimensional integral in the coordinate space of two particles 1 and 2, where the integrand contains Coulomb functions for both the particles, the term $\frac{1}{|{\stackrel{\ensuremath{\rightarrow}}{\mathrm{r}}}_{1}\ensuremath{-}{\stackrel{\ensuremath{\rightarrow}}{\mathrm{r}}}_{2}|}$, and an exponential term, i…
The normal vibrations of crystalline trans-1,4-polybutadiene have been calculated by combining interchain atom-atom potentials with the previously proposed intrachain force field. These calculations have been used to analyze the infrared and Raman spectra of an essentially all-trans urea-complex polymer. The band spli…
Abstract The assignment of the Raman frequencies from 200 to 1800 cm −1 has been made taking into account the values calculated by Brandmüller et al. for a planar molecule since only the H atoms of NH 2 are out of the plane. In the crystal the V line is unusually weak and the 1276–1284 cm −1 broad band is extremely st…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolarized crystal spectra of potassium tetrachloropalladate(II) and potassium tetrabromopalladate(II)Rhonda M. Rush, Don S. Martin, and Roger G. LeGrandCite this: Inorg. Chem. 1975, 14, 10, 2543–2550Publication Date (Print):October 1, 1975Publication History Published online…
Abstract Glauconite-smectite and illite-smectite interlayered minerals are compared by various means in an attempt to establish the mineralogical relations between the two groups. Experiments at 2 Kb pressure and 200–350°C are reported as well as microprobe scans of pelletal glauconites. This new information is used a…
The magnetic susceptibitlity of 243AmO2 from 2.2 to 97 °K. The sample showed an antiferromagnetic transition at 8.5±0.5 °K and to regions of temperature-dependent paramagnetism above 15 °K. (AIP)
The growth of Brucella abortus (US-19) in a complex tryptose-yeast extract medium containing D-glucose is inhibited by 10 mM erythritol. The enzymes of the erythritol pathway, except for D-erythrulose 1-phosphate dehydrogenase (D-glycero-2-tetrulose 1-phosphate:nicotinamide adenine dinucleotide (NAD+) 4-oxidoreductase…
Summary Using the acetylene reduction technique, nitrogen fixation was measured in Rocky Creek, a small seasonally dry Californian stream. In the 3 years since 1970 nitrogen fixation varied seasonally and spatially, being highest in the early stages of colony growth in shallow, clear regions where there was little sha…
Machine learning (ML) is transforming all areas of science. The complex and time-consuming calculations in molecular simulations are particularly suitable for an ML revolution and have already been profoundly affected by the application of existing ML ...Read More
The ESR spectra of ${\mathrm{Rb}}^{+}$TCN${\mathrm{Q}}^{\ensuremath{-}}$, of ${\mathrm{K}}^{+}$TCN${\mathrm{Q}}^{\ensuremath{-}}$, and of TM${\mathrm{B}}^{+}$ (tri-methyl-benzimidazolium) TCN${\mathrm{Q}}^{\ensuremath{-}}$ were measured. The observed dipolar splittings unequivocally prove that the ESR signals derive f…