Materials Literature
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The reduction by hydrogen of Fe 3+ , Ce 4+ , and Sn 4+ in soda‐lime‐silica glass was found to be diffusion‐limited in the glass transition temperature range (500°C). The reduction was studied in fibers by chemical analysis and in bulk samples by optical absorption. Reduction to Fe 2+ , Ce 3+ , and Sn 2+ proceeds by a…
X-ray and magnetic studies have been made on the intermetallic compound Co 3+ x Ti 1- x . X-ray study indicates that Co 3+ x Ti 1- x with the Cu 3 Au-type structure has the phase field ranging from about 20.5 to 25.0 at. % Ti( x =0.180∼0) below 1,000°C. According to magnetic measurements, Co 3 Ti( x =0) is a paramagne…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAntiferromagnetism in transition metal complexes. III. Ground and low-lying excited states of cupric acetateR. W. Jotham and Sidney F. A. KettleCite this: Inorg. Chem. 1970, 9, 6, 1390–1395Publication Date (Print):June 1, 1970Publication History Published online1 May 2002Pub…
An important objective in the development of a pressure suit for a human being is to permit the wearer full mobility, whether pressurized or not, without interfering with physical capability. Although the human skin is stretched during body motion, there is virtually no stretch along certain lines, here called “lines…
Summary Hodrushite, a new sulphosalt of copper and bismuth, was found in the Rosalia ore vein at Banská Hodrušá near Banská Štiavnica, Czechoslovakia. It has chemical composition Cu 8·12 Bi 11·54 Fe 0·29 S 22 (as determined by electron-microprobe method) close to Cu 8 Bi 12 S 22 . Symmetry is monoclinic, space group A…
X-ray powder data for the compounds CaO.Al2O3 and CaO.2Al2O3 have been obtained from the pure synthesized compounds. The detail of the patterns is considerably greater than that obtained by previous workers.
The dc electrical conductivity of single-crystal and polycrystalline alumina has been measured in the temperature range 600-1573 K using an apparatus designed to avoid errors due to extraneous conductance paths. Experimental data are presented which cast serious doubts on values published hitherto.
Using potentiostatic anodic polarization techniques, the influence of chloride ions on the anodic dissolution kinetics of a series of nickel-chromium binary alloys has been studied. Based on polarization data, evidence is presented to show that over the range 20-100 w/o Cr, chloride affects the cathodic partial proces…
An exploratory study of the effects of compositional variation on glass formation in low‐silica aluminate compositions revealed that CaO is essential for glass formation at ordinary quenching rates. Other oxides, such as Li 2 O, MgO, BaO, ZnO, Na 2 O, K 2 O, BeO, B 2 O 3 , and PbO, can be present in the glass in limit…
The adiabatic elastic moduli of single-crystal Zr vary linearly with hydrostatic pressures up to 4.7 kbar. The pressure derivatives are dC11/dP=3.93, dC33/dP=5.49, dC44/dP=−0.22, dC66/dP=0.26, dC12/dP=3.42, and dC13/dP=4.25. The average high-temperature Gruneisen mode γ̄H calculated from this data is in wide disagreem…
Surf-zone diatom populations occurring along the west coast of the Olympic Peninsula, State of Washington, are quite comparable to similar surf-zone populations along the west coast of North Island, New Zealand. In both locations, Chaetoceros armatum T. West contributes the predominant biomass. Asterionella glacialis…
A statistical mechanical model of gas solubility in glass is presented. For equilibrium, the Gibbs free energy of the free gas is equated to that of the gas in solution. Expressions for the Gibbs energies are obtained from assumptions of the atomic motion in the free gas and dissolved states. The resulting solubility…
Abstract A palmityl thioesterase II which is insensitive to inhibition by diisopropyl fluorophosphate has been purified 20-fold from extracts of Escherichia coli. This enzyme exhibits properties which distinguish it from the more substratespecific diisopropyl fluorophosphate-sensitive palmityl thioesterase I known als…
The magnetic properties of the hexagonal intermetallic compounds involving the rare-earth and3dtransition metals have been reported in the literature. These alloys look promising as fine-particle permanent magnets. A large number of samples in the system SmCo5-xCuxwere prepared by induction melting under a protective…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTVibrational and pure nuclear quadrupole resonance spectra of hexahalometalatesTheodore Lawrence Brown, W. Gordon McDugle Jr., and L. Gregory KentCite this: J. Am. Chem. Soc. 1970, 92, 12, 3645–3653Publication Date (Print):June 1, 1970Publication History Published online1 May…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNuclear magnetic resonance spectra and the electronic spectra of some silicon and germanium phthalocyaninesAlexander R. Kane, John F. Sullivan, David H. Kenny, and Malcolm E. KenneyCite this: Inorg. Chem. 1970, 9, 6, 1445–1448Publication Date (Print):June 1, 1970Publication…
Morphological, x-ray crystallographic and x-ray topographic studies on many specimens grown in this laboratory lead to a consistent description of polytypism in vapour-phase grown ZnS. Crystal growth begins with the emerging of hexagonal 2H needles from the polycrystalline substrate. The needles thicken during the gro…
Bis-(4′-n-alkoxybenzal)-2-chloro-1, 4-phenylenediamines and bis- (4′-n-alkoxybenzal)-2-methyl-1, 4-phenylenediamines with different alkoxy groups have been synthesized. Similar compounds with fluoro, bromo and chloro groups replacing the alkoxy groups have also been prepared. All the compounds show a nematic liquid ph…
The crystal dynamics of sodium nitrite has been studied by coherent neutron inelastic scattering techniques. The normal modes of vibration propagating along the three principal symmetry axes in the crystal at 296°K have been measured. The results have been used to find the parameters of rigid ion models for NaNO 2 in…
The velocity of edge dislocations in 99.999% pure copper crystals has been measured as a function of stress at temperatures from 66°K to 373°K by means of a torsion technique. The range of resolved shear stress was 0 to 15 megadynes/cm2 for seven temperatures (66°K, 74°K, 83°K, 123°K, 173°K, 296°K, 373°K). Dislocation…