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Description The Symposium on Electron Fractography was presented during the Seventieth Annual Meeting of the Society held in Boston, Mass., 25—30 June 1967. The symposium was sponsored by Committee E24 on Fracture Testing of Metals. The symposium chairman was C. D. Beachem, Naval Research Laboratory.
Abstract Coordination complexes containing hexa‐acetic acid metal groups are reported with the divalent cations Mg, Mn, Co, Ni, Cu and Zn and with the tetrafluoroborate, perchlorate and nitrate anions. Visible spectra, some infrared data and isomorphism according to X‐ray powder diagrams are recorded. The compounds ar…
The preparation of eleven heteropolytungstate anions, X2ZW17O62H2x–(X = P or As; Z = Mn, Co, Ni, or Zn) is described. These include the first heteropolyanions with MnIII as heteroatom. The stabilities of the anions towards acid and base, and the redox potentials and magnetic moments of the Z heteroatoms are reported,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermal Behavior of Exhaust Gas Catalytic ConvertorJoseph Vardi and W. F. BillerCite this: Ind. Eng. Chem. Process Des. Dev. 1968, 7, 1, 83–90Publication Date (Print):January 1, 1968Publication History Published online1 May 2002Published inissue 1 January 1968https://pubs.ac…
Abstract Fluorsulfurylisocyanat ( 1 ) reagiert mit Verbindungen, die reaktionsfähigen Wasserstoff enthalten. Auf diese Weise wurden hergestellt: equation image Diese bilden mit Alkali‐, Erdalkali‐ und quartären organischen Kationen gut kristallisierbare Salze. Die Reaktion von Fluorsulfurylisocyanat mit SF 4 führt zu…
The magnetic properties of Mn(salen) and several other manganese(II) Schiff-base complexes have been studied over the temperature range 80–300°K. These measurements, coupled with X-ray powder data, suggest a binuclear structure for Mn(salen), in which there is antiferromagnetic exchange. The data for the other complex…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBoron photochemistry. II. Irradiation of sodium tetraarylborates in alcohol solutionsJack L. R. Williams, J. C. Doty, Patrick J. Grisdale, Thomas H. Regan, Glenn P. Happ, and D. P. MaierCite this: J. Am. Chem. Soc. 1968, 90, 1, 53–55Publication Date (Print):January 1, 1968Pu…
A stability study of a synchronous machine is performed by applying the Nyquist stability-criterion to the equations which describe the behavior of the machine during small displacements about a steady-state operating point. This investigation reveals that, in some cases, machine instability can occur at low operating…
I t is flOW /)o ssible to unify th e descnj)tion of the J)lastic flow that occurs ill various circumstances; rangillg )i"om creep, through ordinaty tensile tests, to high-speed impact.T his is dOlle by using a sim/)le d)mamic statistical theOlY ill which the al'erage behavior of a large collection of dislocations is c…
Les relations théoriques établies dans la précédente publication sont comparées à diverses données expérimentales sur la loi de décroissance et sur l'intensité intégrée pour des monocristaux et des solutions aromatiques renfermant ou non de l'oxygène dissous. Dans tous les cas examinés, l'accord trouvé est excellent.…
Abstract Ferrous iron in the layers increased 2‐fold or more on deferration of coarser fractions of micaceous vermiculite naturally weathered from biotite (Colorado and Transvaal sources). The ferric iron content of the layers was decreased by the deferration treatment but the original content was restored by subseque…
Principles involved in analyzing a corrosion situation according to electrochemical methods are described. The basic formulas of reactions are given, together with an explanation of their implications and use. The commonly accepted theories of inhibition and passivation are discussed in electrochemical terms.
We studied the glass-formation range of tellurite systems containing TeO2. The experiments were made in the same way as in previous reports on the borate, silicate and germanate systems. The crucibles employed were made of Au-alloy containing 15% Pd. Except for TeO2, the Oxides used were of 16 kinds of a-group element…
Abstract Several series of ABA‐type “tapered” block polymers of styrene (monomer A) with isoprene or butadiene were prepared with the use of n ‐butyllithium or sec ‐butyllithium as initiators in benzene solution. The stress‐strain curves of the raw polymers are reported, showing that many of them behave at ambient tem…
Abstract The reflectivity of CdO has been measured up to 13 eV on single crystals and polycrystalline material. Moreover the absorption of thin films was studied. The frequency dependence of the optical constants evaluated by Kramers‐Kronig analysis is discussed with regard to the band structure calculated by Maschke…
Measurements of the e.s.r. and optical spectra of the potassium and sodium molybdenum bronzes have been made. It is concluded that the observed e.s.r. signals arise from Mo5+ donor levels situated < 1 eV below the conduction band of the host MoO3 matrix. A model for the electronic structures of these compounds is prop…
Abstract The decay kinetics of sinusoidal surface profiles on copper annealed in a hydrogen atmosphere were investigated in the temperature range 600 to 1030 °C in order to determine the temperature dependence of the surface self‐diffusion coefficient, D s . Below 910 °C the surface profiles were found to be faceted r…
The syntheses and chemical properties of several new trisdicyano-1,2-dithiolene complexes of transition metals are described. These complexes have anions of the type [MS6C6(CN)6]z where M = Mn, Fe, Mo, and W and z=–2 and M = Fe and Co where z=–3. An improved synthesis of the known [CrS6C6(CN)6]2– is reported. The beha…
La structure magnétique de la variété rhomboédrique de Cr2S 3 (a = 5,94 Å ; c = 16,7 Å ; groupe R3) comprend trois sous-réseaux magnétiques : 3a et 3b parallèles et 6c anti-parallèle. La variation thermique légèrement différente de l'aimantation des sous-réseaux donne lieu à un faible ferrimagnétisme croissant de zéro…
Simplification of Ramsey's equation applied to the 195Pt chemical shift in square-planar platinum(II) complexes leads to an equation in which the paramagnetic shift is proportional to a linear combination of the wavelengths of two transitions in the absorption spectra of the complexes. The factor of proportionality de…