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Abstract A new structural model for octacalcium hydrogenpentakis(phosphate) succinate pentahydrate, Ca8H(PO4)5(C2H4·(COO)2)·5H2O, a reaction product of octacalcium dihydrogenhexakis(phosphate) pentahydrate, Ca8H2(PO4)6·5H2O, OCP, and succinate ions, is proposed on the basis of similarities in the unit cell dimensions…
Abstract A Mössbauer spectrum of a series of potassium vanadate glasses containing 10 mol% Fe2O3 shows a paramagnetic quadrupole doublet, of which isomer shift proves to be smaller than 0.4 mm s−1 with respect to metallic iron. This indicates that the individual Fe3+ ion is present at the substitutional site of the V5…
Abstract Secondary electron emission (SEE) characteristics, i.e., SEE yield maximum, the electron energy corresponding to the maximum yield, E max , and crossover energies at which the SEE yield is unity, as a function of angle of incidence were determined for Kapton and Teflon. Photoelectron yield as a function of an…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDynamic and static quenching of the luminescence of ruthenium(II) polypyridine complexes by heteropolytungstate anions. Direct measurements of intramolecular electron-transfer rate constantsRoberto Ballardini, M. Teresa Gandolfi, and Vincenzo BalzaniCite this: Inorg. Chem. 1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT(Vinyloxy)chlorocyclotetraphosphazenes. The use of two-dimensional phosphorus-31 NMR spectroscopy in phosphazene chemistryDouglas E. Brown and Christopher W. AllenCite this: Inorg. Chem. 1987, 26, 6, 934–937Publication Date (Print):March 1, 1987Publication History Published…
In quantitative electron energy loss spectrometry, it is desirable to estimate the background law below core edge energy in a way that provides the maximum signal-to-noise ratio. Assuming an inverse power background model and independently Poisson distributed measurements, it is shown how to achieve this goal by using…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTheoretical study of the ground- and excited-state reactivity of sodium and hydrogen fluoride. Comparison of SCF-CI and VB treatmentsAlain Sevin, Philippe C. Hiberty, and Jean Michel LefourCite this: J. Am. Chem. Soc. 1987, 109, 6, 1845–1852Publication Date (Print):March 1,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLuminescence from and absorption by the 3T1g level of the hexacyanocobaltate(III) ionL. Viaene and J. D'OlieslagerCite this: Inorg. Chem. 1987, 26, 6, 960–962Publication Date (Print):March 1, 1987Publication History Published online1 May 2002Published inissue 1 March 1987htt…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure and electrochemical properties of antiferromagnetically coupled binuclear hydroxo-bridged copper(II) complexes with pyridazine and phthalazine ligands. Crystal and molecular structures of [.mu.-3,6-bis(1-pyrazolyl)pyridazine-N2,.mu.-N3,.mu.-N4,N5](.mu.-hydroxo)tric…
Abstract This paper describes the proper external potential formulation of a cathodic protection system employed for corrosion prevention of structures in infinite electrolytes. The boundary condition associated with the mathematical formulation is not of the standard type encountered in hydrodynamic, electrostatic or…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDilead(II) chalcogenide anions Pb2Ch32- (Ch selenium, tellurium): a lead-207, tellurium-125 and selenium-77 solution NMR study. X-ray crystal structure of (2,2,2-crypt-K+)2Pb2Se32-Mar Bjorgvinsson, Jeffery F. Sawyer, and Gary J. SchrobilgenCite this: Inorg. Chem. 1987, 26, 5…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and characterization of an (acylperoxo)iron(III) porphyrinJohn T. Groves and Yoshihito WatanabeCite this: Inorg. Chem. 1987, 26, 6, 785–786Publication Date (Print):March 1, 1987Publication History Published online1 May 2002Published inissue 1 March 1987https://pu…
Infrared spectroscopic studies of charge‐coupled substitution in silicate glasses and crystals along the joints x MAlO 2 (1 – x )SiO 2 (M = Li, Na, K, Rb, and Cs; 0.10 ≤ x ≤ 0.60) were carried out in the range 2000 to 200 cm −1 Three major absorption bands appeared in the 1100‐, 800‐, and 500‐cm −1 regions. For a spec…
The annealing effect of ethylene ionomers annealed at various temperatures and for various periods was studied by differential scanning calorimetry. Two endothermic melting peaks were observed for all the ethylene ionomers annealed. The melting peak at the lower temperature, which was assigned to bundlelike crystal ow…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotodecomposition of acrolein in oxygen-nitrogen mixturesEdward P. Gardner, Paul D. Sperry, and Jack G. CalvertCite this: J. Phys. Chem. 1987, 91, 7, 1922–1930Publication Date (Print):March 1, 1987Publication History Published online1 May 2002Published inissue 1 March 1987h…
Abstract Ten commercial linear low‐density polyethylenes (LLDPE) were characterized by solution viscosity, size exclusion chromatography, SEC, and 13 C nuclear magnetic resonance. The resins were copolymers of ethylene with butene, hexene, or octene. They were prepared in gas phase (with narrow or very broad molecular…
MgO produced by vacuum decomposition of Mg(OH) 2 is formed as aggregates containing both open and closed pores. The surface area and the volume of the open pores, as measured by N 2 adsorption, were found to be 300 m 2 /g and 0.14 cm 3 /g, respectively. Through calorimetric and TEM studies, reported elsewhere, the ini…
Abstract Electrochemical oxidation of a solution containing BEDT-TTF, (n-C4H9)4NI3,and small amount of (n-C4H9)4NAuI2 gave a new ambient-pressure superconductor (Tc=3.6 K), which coexisted with the superconducting θ-type salt but was clearly distinguished by the X-ray examination. The crystal data are: (C10H8S8)2I3, m…
Abstract Mixed-layer clay minerals of illite-smectite, having smectite contents ∼25% and IS ordering, kaolinite-smectite, and a three-component variety with kaolinite-smectite-chlorite-like material are described from a Carboniferous paleosol in South Wales. The clays, which are restricted to particular horizons, are…
Molecular dynamics computer simulations were used to study surfaces of pure silica glass. The potentials used here were those previously established to model bulk silica and have been extended to study surface relaxation in a perfect vacuum. A large number of surfaces were made using different starting configurations;…