Materials Literature
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Ferromagnetic nickel-copper alloys can be charged with cathodic hydrogen in high concentrations whereby they loose their ferromagnetic behavior. Measurements of magnetization of these alloys show a quicker absorption of hydrogen compared to nickel. The interstitial occlusion of hydrogen gives rise to a reversible latt…
The spin-wave stiffness D of iron-palladium alloys containing 10, 22, 40 and 100 at.% iron has been measured by the neutron small-angle-scattering technique. The values of D are consistent with those derived from low-temperature saturation magnetization and specific heat measurements on alloys with iron concentrations…
Summary Hydrothermal studies in the silica-rich region of the CaO-SiO 2 -H 2 O system have given information on the stability field of tobermorite. At saturated steam pressures tobermorite is unstable relative to xonotlite (C 6 S 6 H) above 140 °C but between 10 000 and 40 000 lb/in. 2 (69 and 276 N/mm 2 ), the decomp…
Abstract Es gelang erstmals, Einkristalle der monoklinen B‐Form von Tb 2 O 3 darzustellen. Eine Röntgenstrukturuntersuchung zeigt, daß BTb 2 O 3 in der Raumgruppe C ‐C2/m kristallisiert und mit BSm 2 O 3 isotyp ist.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhosphorus-31 nuclear magnetic resonance studies of coordination compounds. I. Stereochemistry of some complexes with multidentate ligandsJames W. Dawson and Luigi M. VenanziCite this: J. Am. Chem. Soc. 1968, 90, 26, 7229–7233Publication Date (Print):December 1, 1968Publicat…
Abstract A modus operandi is developed for characterizing, in quantitative morphological terms, the structural changes occurring during the preparation (spinning, drawing, and heat setting) and testing (tensile modulus) of isotactic polypropylene fiber. This involves the application of the following eight different ph…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal and molecular structure of chlorotriphenylphosphonium bis(cis-1,2-bis(trifluoromethyl)ethene-1,2-dithiolato)gold, [PCl(C6H5)3][Au(S2C2(CF3)2)2]John H. Enemark and James A. IbersCite this: Inorg. Chem. 1968, 7, 12, 2636–2642Publication Date (Print):December 1, 1968Pub…
The annealing kinetics of dislocation loops in quenched aluminium has been studied using transmission electron microscopy techniques. An influence of the vicinity of the foil surface on the rate of climb was confirmed. The apparent activation energy for climb of faulted loops was found to be 1·18 ± 0·02 ev and the pre…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMatrix infrared spectrum and bonding in the lithium superoxide molecule, LiO2Lester AndrewsCite this: J. Am. Chem. Soc. 1968, 90, 26, 7368–7370Publication Date (Print):December 1, 1968Publication History Published online1 May 2002Published inissue 1 December 1968https://pubs…
SUMMARY: Irrespective of the nature of the growth-limiting substance, the potassium content of Aerobacter aerogenes (growing in a chemostat at a fixed dilution rate) increased progressively from about 1.3% to 4.2% of the bacterial dry weight with changes in culture NaCl concentration from 0 to 40 g./l. Similarly, the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFluorescence of zinc and magnesium etioporphyrin. I. Quenching and wavelength shifts due to complex formationDavid G. Whitten, Irene G. Lopp, and Peter D. WildesCite this: J. Am. Chem. Soc. 1968, 90, 26, 7196–7200Publication Date (Print):December 1, 1968Publication History P…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAcidic sites on mordenite: an infrared study of adsorbed pyridineFrank R. CanningsCite this: J. Phys. Chem. 1968, 72, 13, 4691–4693Publication Date (Print):December 1, 1968Publication History Published online1 May 2002Published inissue 1 December 1968https://pubs.acs.org/doi…
Methods are described for analysing the high-temperature thermodynamic properties of crystals into quasi-harmonic (qh) and explicit anharmonic (anh) contributions. The most useful functions to investigate are the entropy, the constant volume heat capacity and the Grüneisen parameter γ( T,V ) = β V /χ s C p . Δ S anh a…
Studies are described which involve the routes to the equiaxed fine structure needed for superplastic behaviour in two-phase Zn–Al alloys. These indicate that the development of a spinodal structure is not an essential step towards achieving a superplastic structure in this alloy. Some microstructural aspects and mech…
A formal derivation of an asymptotic expansion for the Helmholtz free energy FN of a system of N Λ-dimensional rigid spheres of diameter Σ is given, which has the form, FN / NkBT ∼ lim τ → 1 ν ln(λ / σ) − ν ln(τ − 1) + C + D(τ − 1) + E(τ − 1)2 + ···, where kB is Boltzmann's constant, λ is the mean thermal de Broglie w…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAnhydrous and hydrated rare earth acetylacetonates and their infrared spectraMary Frances Richardson, William F. Wagner, and Donald E. SandsCite this: Inorg. Chem. 1968, 7, 12, 2495–2500Publication Date (Print):December 1, 1968Publication History Published online1 May 2002Pu…
The small-angle scattering of a non-graphitizable carbon produced from polyacrylonitrile is studied. The evaluation of the scattering data has been based on recent developments in small-angle scattering theory. The results show the existence of a micropore system with diameters in the 10–30 Å range. The average pore d…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructural studies of pentacoordinate silicon. III. Tetramethylammonium bis(o-phenylenedioxy)phenylsiliconateF. Peter Boer, John J. Flynn, and June W. TurleyCite this: J. Am. Chem. Soc. 1968, 90, 25, 6973–6977Publication Date (Print):December 1, 1968Publication History Publi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT1,3-Di-tert-butylallene oxide. Isolation and isomerization to trans-2,3-di-tert-butylcyclopropanoneRonald L. Camp and Frederick Davis GreeneCite this: J. Am. Chem. Soc. 1968, 90, 26, 7349Publication Date (Print):December 1, 1968Publication History Published online1 May 2002P…
Extensive solid solution was observed in the system Pb(Sc 1/2 /,Nb 1/2 ,) 1‐x ,Ti x ,O 3 . In the range 0 ≤ x ≤ 0.425 a rhombohedral ferroelectric phase was stable at 25° C. In the range 0.45 ≤ x ≤ 1.00 a tetragonal ferroelectric phase was stable at this temperature. The phase diagram of the system below 500° C strong…