Materials Literature
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The compositional dependence of the magnetoelastic sensitivity of Permalloy films has been studied by a number of investigators, but their results are in disagreement regarding the compositions required for zero magnetostriction, the agreement with bulk values, and the anisotropy of the magnetoelastic coefficients. Th…
The 5000 series nonheat-treatable aluminum magnesium alloys are recognized as superior to other high-strength aluminum alloys for marine applications. However, a potential corrosion and stress corrosion hazard exists in these alloys from intergranular precipitation of a magnesium-aluminum compound. This paper summariz…
Neutron diffraction studies have been made of solid solutions of ferromagnetic CrTe and antiferromagnetic CrSb which crystallize in the hexagonal NiAs structure. Similarities are found with the isostructural system MnSb-CrSb, in which good agreement is obtained with de Gennes predictions for the effects of double exch…
Summary The mineralogy of the clay fraction from basaltic soils in the Galilee, Israel, has been studied by X‐ray and differential thermal analysis techniques, supplemented by electron‐micrographs and chemical determinations. The mineralogical composition of the clay was greatly influenced by the amount of rainfall. I…
Previous studies on copper ferrite report conflicting data as to the effect of quenching temperature on the transformation temperature. Data of the present study reveal that the reason for this disagreement has been insufficient attention to the influence of chemical stoichiometry. The transition temperature of copper…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics of the Incorporation of Magnesium(II) into Porphyrin1Stuart J. Baum and Robert A. PlaneCite this: J. Am. Chem. Soc. 1966, 88, 5, 910–913Publication Date (Print):March 1, 1966Publication History Published online1 May 2002Published inissue 1 March 1966https://pubs.acs…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIsotropic Nuclear Magnetic Resonance Shifts in Tetrahedral Bispyridine and Bispicoline Complexes of Nickel(II)R. H. Holm, G. W. Everett Jr., and William DeW. Horrocks Jr.Cite this: J. Am. Chem. Soc. 1966, 88, 5, 1071–1073Publication Date (Print):March 1, 1966Publication Hist…
Abstract The solubility properties of poly(vinyl alcohol) (PVA) vary with the method of preparation of the poly(vinyl acetate) (PVAc) from which it is derived. PVAc was prepared with free‐radical catalysts over a range of temperatures from −78 to 90°C. with solvents of varying chain‐transfer ability. The corresponding…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Crystal and Molecular Structure of Dimeric Bis(acetylacetonato)aquocobalt(II) and the Preparation of Some Other New HydratesF. A. Cotton and R. C. ElderCite this: Inorg. Chem. 1966, 5, 3, 423–429Publication Date (Print):March 1, 1966Publication History Published online1…
Abstract An attempt is made to explain the differently shaped bubbles observed growing on a surface during nucleate boiling of water. Some of the bubbles photographed were very close to the spherical shape, while others were close to the hemispherical. Also, a number of bubbles had intermediate shapes and were called…
Taylor found that the thermal conductivity, k t , of the transition metal carbides and nitrides increases with increasing temperature, T , at high temperatures. This behavior is different from that of metals, for which k t , is approximately independent of T , as noted by Taylor. It is proposed that defects cause the…
Saturation moments, Curie temperatures, and supporting crystallographic data are reported for a series of ferrimagnetic intermetallic compounds of the stoichiometry R2Co17, where R is any of the rare-earth elements Y, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, and Lu. The saturation moment of Y2Co17 is 27.2, that of Lu2C…
A liquid miscibility occurs within the Quaternary system, Na <sub>2</sub> O-Al <sub>2</sub> O <sub>3</sub> -SiO <sub>2</sub> -CO <sub>2</sub> between Na <sub>2</sub> CO <sub>3</sub> -rich liquids and NaAlSi <sub>3</sub> O <sub>8</sub> -rich liquids. The vapor-saturated liquidus surface does not intersect the miscibili…
The compound Mn3GaC has been found to have a crystal structure of the perovskite type and a ferromagnetic Curie point of 246°±2K°. At a lower temperature, about 150°K, it exhibits a rather abrupt transition to an antiferromagnetic state. At this transition, there is a rapid decrease of lattice parameter and of resisti…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Study of Bis(hexafluoroacetylacetonato)copper(II)J. A. Bertrand and Roy I. KaplanCite this: Inorg. Chem. 1966, 5, 3, 489–491Publication Date (Print):March 1, 1966Publication History Published online1 May 2002Published inissue 1 March 1966https://pubs.acs.org/doi/10.1021/ic…
Abstract Structure–property relationships of poly(vinyl alcohol) have been studied by measuring the crystallinity and water resistance of films derived from samples of varying, known tacticity. Crystallinities of unannealed and annealed films were examined by means of density, infrared, and x‐ray measurements. Higher…
Abstract Wholly aromatic ordered copolyamides of unusually high thermal stability were prepared by the condensation of aromatic diacid chlorides with symmetrical diamines containing preformed aromatic amide units in an ordered arrangement. The preservation of order in the condensation step was assured by using interfa…
A variety of relatively transparent materials containing Eu+ + have become available, thus enabling a study to be made of the magneto-optical properties of the Eu+ + ion in widely different environments. The following materials are reviewed: Eu2SiO4 (orthorhombic structure with a ferromagnetic Curie temperature Tc of…
Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans the biological, physical, and social sciences.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolarographic Reduction of Porphyrins and Electron Spin Resonance of Porphyrin Anions1Ronald H. Felton and Henry LinschitzCite this: J. Am. Chem. Soc. 1966, 88, 6, 1113–1116Publication Date (Print):March 1, 1966Publication History Published online1 May 2002Published inissue…