Materials Literature
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Abstract The radial coatings of Holocene ooids from Baffin Bay, Texas, are Mg-calcite, whereas the tangential and micritic coatings are aragonite. Centrifugally deposited ooid coatings are similar in many respects to centripetally deposited marine cements. The reason(s) for the mineralogical and textural variation in…
The electrochemical behavior of titanium in deoxygenated acidic chloride solutions, with and without additions of Ti(III) and Ti(IV) ions, has been determined and compared with that observed in acidic sulfate media. A monolayer mechanism has been developed for the active‐state dissolution and passivation of titanium i…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotosensitization of titanium(IV) oxide with tris(2,2'-bipyridine)ruthenium(II) chloride. Surface states of titanium(IV) oxideA. Hamnett, M. P. Dare-Edwards, R. D. Wright, K. R. Seddon, and J. B. GoodenoughCite this: J. Phys. Chem. 1979, 83, 25, 3280–3290Publication Date (P…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics of metal-ion complexation with N-methyltetraphenylporphyrin. Evidence concerning a general mechanism of porphyrin metalationMarilyn J. Bain-Ackerman and David K. LavalleeCite this: Inorg. Chem. 1979, 18, 12, 3358–3364Publication Date (Print):December 1, 1979Publicat…
Measurements of average magnetic susceptibility and magnetic anisotropy on the single crystals of FeTPP in the 4-300 K temperature r ange are reported. These results together wi th the other existing evidence establish an S = 1 spin state for the iron(I1) ion in FeTPP. It is shown that the experimental principal susce…
The variation in stress corrosion susceptibility and cracking morphology of sensitized Type 304 stainless steel in high purity water is reported as a function of combinations of oxygen (0.01 to 8 ppm) and temperature (75 to 288 C). The results are discussed both in terms of the fundamental parameters involved in stres…
The structure of BiVO4 has been determined by the Rietveld method at 300, 573 and 898 K and confirms the space group of the ferroelastic phase as 12/a and that of the paraelastic phase as 141/a. The displacement vectors of the atoms involved in the switching of ferroelastic states are calculated and indicate that the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAllotropic transitions of magnesium nickel hydride (Mg2NiH4)Z. Gavra, M. H. Mintz, G. Kimmel, and Z. HadariCite this: Inorg. Chem. 1979, 18, 12, 3595–3597Publication Date (Print):December 1, 1979Publication History Published online1 May 2002Published inissue 1 December 1979h…
First-of-a-kind fission-heated experiments utilizing uranium oxide particles in liquid sodium have been performed to assess the nature of the passive heat transfer between fast reactor fuel debris and overlying coolant. The experiments were designed to simulate the situation following a core disruptive accident in whi…
Dielectric anisotropy of heavy ice Ih is examined in a wide temperature range by measuring the complex dielectric constants parallel and normal to the c axis, and it is compared with that of ordinary ice Ih (H 2 O ice). The increased anisotropy in the static dielectric constants including only the shift of the extrapo…
Abstract The desorption of methanol and isopropanol by a series of charge-deficient Ca-montmorillonites (prepared by a partial Li-saturation and subsequent heat treatment of Camp-Berteau material) has been monitored gravimetrically and by XRD. The results indicate that about half the total adsorbed molecules do not oc…
Thermal expansion coefficients correlate with a number of physical properties of crystals. Cubic ionic insulators that have two completely filled sets of lattice sites have a maximum value for the product of the coefficient and melting point. Expansion is diminished by the presence of various internal degrees of freed…
The paper employs a Monte Carlo method to calculate the heating, secondary ionization and Lyman-alpha excitation produced by the energetic electrons released by X-ray photoionization of interstellar gas. The new features of this computation are the inclusion of current cross sections for electron collisional ionizatio…
A finite difference numerical analysis technique has been used to evaluate the distribution of the electrode potential within the electrolyte above a galvanic corrosion couple with linear, semi‐infinite, coplanar electrodes. Corrosion reactions are assumed to be under activation control with logarithmic polarization b…
Infrared spectroscopic study of desert varnish, manganese dendrites, river deposits, and other manganese oxide concentrations of the terrestrial weathering environment has shown that the morphological distinctions among them have a sound basis in differences in their mineralogy. The manganese oxide in manganese dendri…
A statistical mechanical theory of the Frank elastic constants is formulated. The free energy functional is constructed for the deformed sample and the free energy density is defined for the case of small spatial gradients. The Frank constants are expressed in terms of the direct correlation function c(1, 2) and the o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and characterization of an oxoporphinatochromium(V) complexJohn T. Groves and William J. Kruper Jr.Cite this: J. Am. Chem. Soc. 1979, 101, 25, 7613–7615Publication Date (Print):December 1, 1979Publication History Published online1 May 2002Published inissue 1 Dece…
Abstract The critical concentration at which a metal‐filled composite becomes electrically conductive can be dramatically reduced by adding the metal as randomly dispersed fibers. The higher the aspect ratio of the fibers, the lower the concentration needed to induce electrical conductance. Composites exhibiting resis…
Abstract The stress‐strain response of crystalline high density polyethylene and of amorphous polycarbonate has been determined in tension and in compression at superimposed pressures up to 1104 MPa(160 ksi). Strain softening occurred in the polycarbonate at low pressures but was inhibited by pressure. Tensile necking…
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