Materials Literature
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Abstract The temperature at which vermiculite loses or gains an interlayer of water molecules was compared for a number of interlayer ion saturations. Results indicate the difference between contracting and expanding forces in vermiculite to be dependent upon interlayer ion charge, distance, and hydration energy. Impo…
The fluorescence of phosphors ABO2:Eu(A=Li, Na; B=Sc, Y, In, La, Gd, and Lu) is reported and discussed. The Eu3+ emission is strongly influenced by the crystal surroundings: in the α-NaFeO2 structure the 5D0—7F1 transition dominates; in the α-LiFeO2 structure the 5D0—7F2 transition, although both structures can be der…
Th e extrapolati on of the melting points , Tin, of th e n paraffins to large chain lengths (n ~ 00) is reexam in ed in order to reso lv e the differences in th e proposed values of th e co nve rgence temperature To = lin' Tin. Experimental liquid en tropies can be made consistant with a term , R In n, proposed by n -…
Abstract The factors affecting the efficacy of a closely packed bed of mixed cotton and a supporting fiber (Teflon, glass, Dynel) were evaluated for oil‐in‐water dispersions. Several other water‐organic systems were also tested. Superficial velocities ranged from 0.2 to 3.5 ft./min. Successful coalescence was attained…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAdsorption of Binary Hydrocarbon Gas Mixtures on Activated CarbonR. J. Grant and Milton ManesCite this: Ind. Eng. Chem. Fundamen. 1966, 5, 4, 490–498Publication Date (Print):November 1, 1966Publication History Published online1 May 2002Published inissue 1 November 1966https:…
The X-ray diffuse scattering from a crystal of NaNO 2 at temperatures above the Néel temperature is analysed to determine the nature of the inter-dipolar interaction in this substance. By taking the Ising model, the space correlation is calculated with the random phase approximation leaving the coefficients of the sho…
B. K. Vainshtein Barking, Essex: Elsevier . 1966. Pp. x + 414. Price £6 10s. The reviewer's job of conveying to prospective readers the flavour of this book has really been done already in the Preface to the book, written by Dr. M. F. Perutz. As Dr. Perutz nicely puts it, "... like Dante the author descends from the h…
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…