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Proto-enstatite, at room temperature, is orthorhombie with 8 units of MgSiO3 in a cell of dimensions a ----9.25, b ----8.74, c = 5.32 A, pseudo space group Pbcn. The atomic coordinates of the pseudo space group were determined from X-ray powder data. The SiO3 chain is fully extended. One of the Mg atoms has an irregul…
A new modification of boron, resulting from the pyrolytic decomposition of BI z on a heated surface (800 C. to 1100 C.), has been found to have a simple rhombohedral structure, with a 0 = 5.057 /~ and c~ = 58.06 , space group R3m, Z ----12. The atomic parameters have been obtained from a single crystal using the prece…
The structure was determined and refined by use of Pa t te rson and Fourier projections on the three faces of the uni t cell. The seven shortest Zr-O separations in the coordination polyhedron around each zirconium range from 2.04 to 2.26 A; since the next nearest Zr-O separat ion is 3.77 ~ , the coordination number o…
Abstract The influence of zinc oxide and stearic acid on the structures of vulcanizates was traced in stocks with mercaptobenzothiazole by means of the kinetics of swelling. It was found that zinc oxide in the presence of stearic acid has a marked influence on the rate and degree of crosslinked network formation in vu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReaction of Hydrazine Hydrate and Phenylhydrazine with MalononitrileTADASHI SATOCite this: J. Org. Chem. 1959, 24, 7, 963–966Publication Date (Print):July 1, 1959Publication History Published online1 May 2002Published inissue 1 July 1959https://pubs.acs.org/doi/10.1021/jo010…
Abstract The thermal‐oxidative degradation of films of poly(ethyl acrylate) about 35 μ thick were studied in the temperature range of 80 to 120°C. The degradation was followed by determining intrinsic viscosity changes, absorption of oxygen, and production of titratable acidity in the polymer. From viscosity results a…
Results of measurements of retraction as a function of twist are given for yarns produced by continuous twisting processes, as opposed to the twisting of a fixed length. These are compared with Tattersall's2 earlier work and also with the predictions of Treloar's1 theory. When continuous twisting methods are used, the…
(1959). The saturation magnetostriction of ferromagnetics. Advances in Physics: Vol. 8, No. 31, pp. 252-291.
Abstract The potentials at which iron is converted into anhydrous cubic oxide in certain inhibitive solutions have been measured and it has been shown that these potentials are more negative than the potentials acquired by unpolarised specimens immersed in the solutions for 3 days. It is suggested that when iron, carr…
Abstract Effects of gamma radiation on the properties, such as melt viscosity, elastic modulus above the melting point, creep fracture time above the melting point, density, and the degree of crystallinity by x‐ray diffraction, of polytetrafluoroethylene resin were studied. When exposed to the radiation from a Co 60 g…
Abstract Using a torsion pendulum, measurements have been made of the dynamic modulus of rigidity of wool fibers during the process of sorbing or desorbing water (from the vapor phase). Anomalous behavior is observed, with low values of rigidity which cannot be accounted for in terms of equilibrium data. It appears th…
Abstract Crystallization kinetics of Hercules polypropylenes were studied between 133 and 155 ° C. using dilatometers. The crystallization rates of these samples became too rapid below 133 ° C. for accurate dilatometric measurements. One sample (A) was a commercial sample containing stabilizer and 9% extractable polym…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSystematics in the Chemistry of the Boron HydridesR. W. Parry and L. J. EdwardsCite this: J. Am. Chem. Soc. 1959, 81, 14, 3554–3560Publication Date (Print):July 1, 1959Publication History Published online1 May 2002Published inissue 1 July 1959https://doi.org/10.1021/ja01523a…
The rate of isothe rm al bulk crystalli zation of poly (e hloro trifluoroethylene) , 2'm = 221 C, was measured from 170 0 to 200 0 C. The intrinsic bulk cr ystallization, which acc uraLe ly ~o llow e d a n n= 2 la\,:, was. shown t o be a res ult of the i~lj ect ion of primary nu clei spora di cally III Lime, with on e…
Abstract The problem of the mechanism of macromolecule orientation occurring in the formation of fibers from polymer melts has been qualitatively analyzed. As a result of birefringence, x‐ray, and spinning stress investigations carried out on polycapronamide fibers, the main parameters determining orientation have bee…
Abstract Vinyl-(I), allyl-(II), and 3-butenyl-trimethylsilane(III) were polymerized at 70°C in n-heptane with the heterogeneous catalyst of Ziegler’s type. The monomer I gave only a small yield of polymer, while the monomers II and III gave moderate amounts of polymers. The amorphous and crystalline polymers of these…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAcetylenic Corrosion InhibitorsG. L. Foster, B. D. Oakes, and C. H. KuceraCite this: Ind. Eng. Chem. 1959, 51, 7, 825–828Publication Date (Print):July 1, 1959Publication History Published online1 May 2002Published inissue 1 July 1959https://pubs.acs.org/doi/10.1021/ie50595a0…
Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text R. N. Smartt and W. H. Steel, "Birefringence of Quartz and Calcite," J. Opt. Soc. Am. 49, 710-712 (1959) Export Citation BibTex Endnote (RIS) HTML Plai…
Measurements of the electrical conductivity σ, the thermal conductivity K, and the Seebeck coefficient (thermoelectric power) α, of InAs1−xPx have been made at high temperatures with x varying from 0 to 0.4. Between 450° and 800°C, the average thermoelectric figure of merit (z = α2σ/K) increases moderately with x for…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Heat Capacity and Thermodynamic Functions of β-Uranium Hydride from 5 to 350°K.1,2Howard E. Flotow, Harold R. Lohr, Bernard M. Abraham, and Darrell W. OsborneCite this: J. Am. Chem. Soc. 1959, 81, 14, 3529–3533Publication Date (Print):July 1, 1959Publication History Publ…