Materials Literature
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The crystal structure of the high temperature form of BaO.B203 (m.p. 1095 + 5C) was determined by conventional three-dimensional Patterson and electron-density syntheses. The heavy atom technique was used to establish the initial phases. BaO.B203 crystallizes in the trigonal system, space group R Sc, with 18 formula u…
Abstract Es werden Gleichungen für die Löslichkeit von Wasserdampf und Wasserstoff in festen Oxiden unter Berücksichtigung der jeweils beteiligten Fehlordnungsstellen abgeleitet. Aus Messungen der Änderung des elektrischen Widerstandes von Cu 2 O, CoO und NiO durch die Gegenwart von Wasserdampf werden obere Grenzwerte…
Abstract A technique has been developed that determines simultaneously solubilities and diffusivities of gases in molten or thermally softened polymers. Henry's law was found to hold up to 20 atm. In addition it was found that pressure had no appreciable effect on diffusion coefficients up to 20 atm. Solubilities and…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh-Pressure (70-kbar) Synthesis of New Crystalline Lead DichalcogenidesMeyer S. SilvermanCite this: Inorg. Chem. 1966, 5, 11, 2067–2069Publication Date (Print):November 1, 1966Publication History Published online1 May 2002Published inissue 1 November 1966https://pubs.acs.o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTQuantitative Phase Analysis by X-Ray Diffraction.R. F. Karlak and D. S. BurnettCite this: Anal. Chem. 1966, 38, 12, 1741–1745Publication Date (Print):November 1, 1966Publication History Published online1 May 2002Published inissue 1 November 1966https://pubs.acs.org/doi/10.10…
The magnetic structure of Fe 2 As has been determined by neutron diffraction. The compound Fe 2 As is antiferromagnetic with the Néel point at about 80°C. Its magnetic structure is different from Mn 2 As. The coupling between layers of iron atoms Fe(II) located at (0, 1/2, z ) and (1/2, 0, \bar z ) is antiparallel, bu…
The compound BaFeO 3‐ x exists in many forms, the hexagonal phase having a wide range in oxygen content (BaFeO 2.63–2.92 ). The other phases have the limited compositions and the distinct structures of perovskite: triclinic I, BaFeO 2.50 ; triclinic II, BaFeO 2.64–2.67 ; rhombohedral I and II, BaFeO 2.62–2.64 ; and te…
BUSING, W. R. & LEVY, H. A. (1957). Acta Cryst. 10, 180. CROMER, D. Z. & LARSON, A. C. (1956). Acta Cryst. 9, 1015. CRUICKSHANK, D. W. J. (1961). In Computing Methods and the Phase Problem in X-ray Crystal Analysis. London: Pergamon Press. IBERS, J. A. (1956). Acta Cryst. 9, 225. IBERS, J. A. & CROMER, D. T. (1958). A…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCharacterization and Electronic Structures of Metal Complexes Containing Benzene-1,2-dithiolate and Related LigandsM. J. Baker-Hawkes, E. Billig, and Harry B. GrayCite this: J. Am. Chem. Soc. 1966, 88, 21, 4870–4875Publication Date (Print):November 1, 1966Publication History…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComplete Electron-Transfer Series of the [M-N4] TypeAlan L. Balch and R. H. HolmCite this: J. Am. Chem. Soc. 1966, 88, 22, 5201–5209Publication Date (Print):November 1, 1966Publication History Published online1 May 2002Published inissue 1 November 1966https://pubs.acs.org/do…
Double-quantum light scattering by a system of molecules is discussed in this paper. Expressions have been obtained for the scattered light intensity considering both the coherent and incoherent contributions. In that coherent contributions are also considered in this treatment, it goes beyond the scope of previous st…
LACTIC acid in its racemic or optically active form can undergo acid catalyzed homopolymerization to yield a polymer of lower molecular weight, which is not suitable for plastic or fibers.<sup>1</sup>However, the cyclic diester, the lactide<sup>2</sup>of lactic acid, can polymerize by anionic ring opening addition mec…
Theoretical equations are developed for typical decompositions of polymers including those in which the volatilization does not follow a simple "reaction order" and those made up of a composite of several reactions of differing energies of activation. The effects of order, activation energy, heating rate and temperatu…
Abstract The behaviour of a number of corrosion-resistant alloys in chloride solutions, in Hanks’s physiological solution (simulating the extracellular body fluids) and as surgical implants has been investigated by electrochemical means, namely potential-time curves for isolated specimens, potential-current density cu…
Pyridine and pyridine-d5 were irradiated with electrons in the solid state at −196°C. After the irradiation, ESR spectra were measured over a temperature range from −196°C to their melting points. For pyridine, a triplet spectrum (separation of 30 G) with a quartet substructure (separation of 4.3 G) was observed at −1…
Sc2(WO4)3, diamagnetic above 30°K, crystallizes in the orthorhombic system, Space Group Pnca, with lattice constants a=9.596±0.004, b=13.330±0.003, and c=9.512±0.004 Å at 298°K. The complete x-ray scattering pattern within a reciprocal lattice hemisphere of radius (sinθ)/λ=1.02 Å−1 was measured with PEXRAD. The crysta…
The thicknesses of oxide films formed in aqueous borate solutions were obtained by the spectrophotometric method after developing the interference colors by evaporating a very thin film of gold or bismuth onto the oxide. The refractive index of the stripped films was determined by the Becke immersion method as 1.57 to…
The torsional creep and creep recovery behavior of amorphous 1,3,5-tri-α-naphthyl benzene was studied, while at metastable equilibrium density, along a specified glassy volume—temperature line, and during isothermal volume contraction below the conventional glass transition temperature Tg. Dilatometric measurements co…
Below the Verwey transition the ${\mathrm{Fe}}^{2+}$ and ${\mathrm{Fe}}^{3+}$ ions on B sites in magnetite are magnetically coupled to $A$-site ions by different exchange constants. We calculate the six-sublattice spin-wave spectrum of this ordered orthorhombic structure, for arbitrary spin quantum numbers and for arb…
The optical constants for electropolished intrinsic germanium have been determined for the spectral region between 0.5 and 3.0 eV at 300 and 120\ifmmode^\circ\else\textdegree\fi{}K. The technique is based on the determination of the ratio ${\mathcal{R}}_{n}=\frac{{R}_{\mathrm{II}}}{{R}_{\ensuremath{\perp}}}$ at its mi…