Materials Literature
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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…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIntrinsic Viscosities of Isotactic Polypropylene in Various SolventsR. ChiangCite this: J. Phys. Chem. 1966, 70, 3, 929–930Publication Date (Print):March 1, 1966Publication History Published online1 May 2002Published inissue 1 March 1966https://pubs.acs.org/doi/10.1021/j1008…
Rhii-2Ter 2"76/~ Teii-1Rhi 2.64 A -1Rhi 2.82 -1Teii 2.61 -2Rhii 2.61 -1Rhi 2.86 -2Teii 2.63 -4Rhrr 2'63 -1Rhli 2"91 -2Rhli 3"05 Table 3. Structure factors
The symmetry properties of spin waves in ferro-, antiferro-, and ferrimagnetic crystals can be conveniently discussed in terms of an appropriate space group as are electron energy states in band theory and normal modes in the theory of lattice vibrations. Dimmock and Wheeler have pointed out that the magnetic space gr…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Structure of the Octacyanomolybdate(V) and -tungstate(V) Ions from Electron Spin ResonanceB. R. McGarveyCite this: Inorg. Chem. 1966, 5, 3, 476–479Publication Date (Print):March 1, 1966Publication History Published online1 May 2002Published inissue 1 March 1966https://do…
The magnetostriction constants λ100 and λ111 for nickel ferrite have been measured using a ferromagnetic resonance technique which also permits measurements of linewidth, g factor, and anisotropy on the same sample. Our measurements show that all of these parameters are essentially temperature independent from 4° to 3…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSILANE COUPLING AGENTSSamuel. Sterman and James G. MarsdenCite this: Ind. Eng. Chem. 1966, 58, 3, 33–37Publication Date (Print):March 1, 1966Publication History Published online1 May 2002Published inissue 1 March 1966https://pubs.acs.org/doi/10.1021/ie50675a010https://doi.or…
Lattice parameters were measured on MgO specimens prepared in air between 450° and 1200°C. The lattice parameter, a , decreases with increase in preparation temperature, T p , and with increase in crystallite size. A hydroxide layer is present on the MgO particles. If MgO is prepared in vacuum, a increases as T p incr…
In orthorhombic CrRO3 (R=rare earth and Y), Cr spins are ordered in a G mode between TN 282°K for R=La, to 112°K for R=Lu. The rare-earth ordering is coupled to the Cr-spin ordering, with the exception of terbium. In the magnetoelectric compound Fe1.15Ga0.85O3, four sites are available for cations, one of these mainly…
Several chromium spinels have been prepared and regular x-ray diffraction intensities were measured on the powders. A Fortran program was developed in order to process the data. It appeared that the results, so obtained, were comparable to those from neutron diffraction techniques. A plot of the U parameter versus a0…
Neutron diffraction measurements confirm that MnP is ferromagnetic between 50° and 291°K, with 1.3 μB/Mn atom directed along [001] of the orthorhombic Pbnm cell. Previous measurements at low temperatures indicated that the compound was metamagnetic; neutron diffraction measurements in zero magnetic field reveal a modu…
Abstract Copolymers of vinyl acetate and vinyl alcohol were studied by differential thermal analysis. The melting points of the copolymers are not a simple function of the composition, but depend on the method of preparation of the copolymers. Partial saponification of poly(vinyl acetate) with sodium hydroxide leads t…
Crystallization rates were measured in vacuum, dry nitrogen, and water‐saturated nitrogen atmospheres from 1300° to 1540°C. In all cases the observed rates were linear. Three reactions appeared to contribute to crystallization: the intrinsic crystallization, the impurity effect of H 2 O vapor, and furnace contaminatio…
Abstract In further work on the vacuum pyrolysis of cotton cellulose, alone or with flame‐retardants, at temperatures usually near 420°, products have been identified and determined. In the tar, laevoglucosan has been determined by an infra‐red absorption method, and by gas‐liquid chromatography of its trimethylsilyl…
A study has been made of the magnetic properties of the spinels ACr2X4, where A is diamagnetic zinc or cadmium, and X is oxygen, sulfur, or selenium. CdCr2Se4 and CdCr2S4 are apparently ferromagnetic with moments somewhat below the predicted value of 6.0 μB/molecule. By contrast, ZnCr2Se4 and ZnCr2S4 are antiferromagn…