Materials Literature
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Abstract The separation nozzle process is based on the partial spatial separation of components of different mass in an expanding supersonic jet stream. The process is of especial interest for the separation of uranium isotopes. Details of a systematic experimental determination of the most favorable operating conditi…
Methods of producing a fibre web for needle-punching on a laboratory machine are described: a parallel-laid card web was suitable for most purposes, though a cross-laid web was less anisotropic. Methods of operation and testing are described; the effects of specimen shape and size on tensile-test results were studied.…
The dielectric constant of zirconia has usually been estimated from data on films. This has led to some values in the region of 12 and some in the region of 25. Since the true value is critical in the interpretation of thin-film behaviour, it has now been determined for the first time on single-crystal material. A val…
The precise temperature dependence of x-ray diffraction effects near the transition temperature of ferroelectric NaNO 2 crystal has been examined. The satellite reflections, 1±σ 5 0, start to appear at T s , 0.2°C below the well-known first-order transition point T t . Marked asymmetry of the satellite reflections was…
A study made of factors influencing sulfide-stress corrosion of a number of low alloy and medium alloy steels showed that their delayed failures when exposed simultaneously to stress and the corrosive action of acidified brine-hydrogen sulfide solutions have most of the features of hydrogen induced, delayed brittle fa…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSensitivities for activation analysis of fifteen light elements with 18-Mev. helium-3 particlesEnzo. Ricci and Richard L. HahnCite this: Anal. Chem. 1967, 39, 7, 794–797Publication Date (Print):June 1, 1967Publication History Published online1 May 2002Published inissue 1 Jun…
Particle size distributions obtained from measurements in a thin section are usually a distorted version of the true distribution. When there is negligible overlap of images the conversion of the observed distribution involves the solution of a Volterra integral equation of the second kind. A closed form of solution i…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHeteropoly blues. III. Preparation and stabilities of reduced 18-molybdodiphosphatesElias Papaconstantinou and Michael T. PopeCite this: Inorg. Chem. 1967, 6, 6, 1152–1155Publication Date (Print):June 1, 1967Publication History Published online1 May 2002Published inissue 1 J…
Abstract Four phenyl‐substituted polyquinoxalines have been prepared by the reaction of combinations of two tetraamines, 3,3′‐diaminobenzidine and 3,3,′4,4′‐tetraaminodiphenyl ether, with two bisbenzils, 4,4′‐dibenzil and 4,4′‐oxydibenzil. The polymers were prepared by melt and solution polymerizations. Melt condensat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHeteropoly blues. II. Reduction of 2:18-tungstatesMichael T. Pope and Elias PapaconstantinouCite this: Inorg. Chem. 1967, 6, 6, 1147–1152Publication Date (Print):June 1, 1967Publication History Published online1 May 2002Published inissue 1 June 1967https://doi.org/10.1021/ic…
A simple Monte Carlo procedure for simulating the scattering of electron beams with incident energies in the range 5-40 kev has been developed, based on a screened Rutherford cross section and the Bethe continuous energy-loss equation. Despite the approximate nature of the initial scattering data, the calculations agr…
Iron was deposited at room temperature in ultra-high vacuum (5 × 10−8 Torr) onto single-crystal films of copper oriented with (001) parallel to their plane. A shutter was moved between source and substrate so that iron deposits in which there were thickness gradients were obtained. Transmission electron micrographs an…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLigand field theory of p2,4 configurations and its application to the spectrum of Bi+ in molten salt mediaHarold Lloyd Davis, Niels J. Bjerrum, and George Pedro SmithCite this: Inorg. Chem. 1967, 6, 6, 1172–1178Publication Date (Print):June 1, 1967Publication History Publish…
Single suspension insulator units of several types as well as multi-unit strings were studied in a large refrigerated chamber. Rime ice of various densities was deposited on these insulators. The increase of leakage currents, the reduction of flashover voltages, and the alteration of voltage distributions along insula…
Cells in a -wild population of a species belonging to the diatom germs Mastogloia may form frustules of 2 strikingly different morphologic types during their vegetative life cycle. Total conversion from coarsely structured morphologic form to a more finely structured form takes place during a single division; hence no…
The antiferromagnetic structure of Mn 5 Si 3 at low temperatures (Néel point 68 °K) has been determined by neutron diffraction using single crystals. The magnetic structure is complicated, and the model proposed consists of a modulated non-collinear spin structure propagated through the crystal in three hexagonally re…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInfrared and nuclear magnetic resonance studies of some germanium phthalocyanines and hemiporphyrazinesJohn N. Esposito, Laurel E. Sutton, and Malcolm E. KenneyCite this: Inorg. Chem. 1967, 6, 6, 1116–1120Publication Date (Print):June 1, 1967Publication History Published onl…
In the orthorhombic modification of TeO 2 (tellurite) each tellurium atom is surrounded by four oxygen atoms at an average distance of 2.0 Å, similar to the tetragonal TeO 2 (paratellurite). The coordination polyhedron is a slightly distorted trigonal dipyramid, with both axial positions and only two of the three equa…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpin equilibria in octahedral iron(II) poly((1-pyrazolyl)-boratesJ. P. Jesson, Swiatoslaw. Trofimenko, and Donald R. EatonCite this: J. Am. Chem. Soc. 1967, 89, 13, 3158–3164Publication Date (Print):June 1, 1967Publication History Published online1 May 2002Published inissue…
Phase relations were studied in the system ZrO 2 ‐MgO with emphasis on the range 1350° to 1600°C. A phase relation was determined from samples, using precision lattice parameters, X‐ray diffraction line intensities, and petrographic observations, and from dynamic observations of the phases present using high‐temperatu…