Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBonding character in tetracoordinate (phthalocyaninato)iron(II) complexes with electron-withdrawing substituents as studied by Moessbauer spectroscopyToshie Ohya, Nagao Kobayashi, and Mitsuo SatoCite this: Inorg. Chem. 1987, 26, 15, 2506–2509Publication Date (Print):July 1,…
A study of ion-plating parameters (primarily deposition rate and substrate bias voltage), coating structure, and the corrosion protection provided by aluminum coatings on uranium is presented. Ion plating at low temperatures yields a variety of aluminum coating structures on uranium. For example, aluminum coatings pro…
The electrical resistivity and superconducting transition temperatures are studied as a function of hydrogen content on two series of Nb-Ta superlattices grown by molecular-beam epitaxy with modulation wavelengths of 20 and 85 A\r{}. Hydrogen enhances the resistivity of the structures which, in extreme cases, leads to…
Abstract The use of high ionic‐strength media for determination of soil pH has been limited primarily to acid soils. In this study, the theoretical and practical significance of the pH of calcareous soils suspended in 1 M KCl was investigated. Solutions from suspensions of 24 soils in 1 M KCl were analyzed for pH, Ca,…
The description of containment iodine behavior in reactor accident sequences involves a combination of iodine volatility effects, deposition/revaporization processes, and mass transport of iodine species. The formation and retention of volatile organic iodides such as methyl iodide, CH3I, are important factors in dete…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTVibrational study of ionic association in aprotic solvents. 11. Formation and structure of mixed aggregates between lithium halides and lithium thiocyanatePawel Goralski and Martial ChabanelCite this: Inorg. Chem. 1987, 26, 13, 2169–2171Publication Date (Print):July 1, 1987P…
In formation of an intermetallic compound from the elementary metals there is usually a contraction in volume. Electron transfer leading to the charge states M(+) and M(-) with increase in valence and decrease in volume explains the more than 2-fold range in contraction for different compounds in the same binary syste…
The fluoresence of pearls and shells of Pinctada margaritifera (black lip oyster) has been measured in order to distinguish the species of mother oysters which produce those pearls. A distinction is possible for pearls of P. margaritifera from those of Pinctada fucata and Pinctada maxima using a difference in the fluo…
The crystal chemistry of complex In(III) halides is discussed and compared with that of other Group III elements and Fe(III), with critical comments and analysis of the available information. The cation/anion packing types occurring among A + [M 3+ X 4 ] halides are classified according to volume per formula unit and…
Abstract Rate constants for the reactions of the NH 2 (X 2 B 1 ) radical with ethane, propane and cyclohexane were measured in an isothermal flow system. Kinetic data were obtained at 4 mbar helium pressure in the high temperature range given below. [NH 2 ](t)‐profiles were mapped at pseudo‐first order conditions [NH…
The reaction of PVF 2 films in aqueous NaOH with the use of tetrabutylammonium hydrogen sulfate as phase transfer catalyst results in surface dehydrofluorination. Subsequent examination of the PVF 2 surface using ATR FT-IR affords evidence as to the structure of dehydrofluorinated PVF 2 . It is found that the infrared…
Experimental investigation of the wear behavior of Magnesia Partially Stabilized Zirconia (Mg-PSZ) rubbed against itself showed that up to three orders of magnitude increase in the wear resistance can be achieved in a particular temperature range that depends on both the sliding speed and the ambient temperature. XRD…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTheoretical studies of electronic properties of polyacene, poly(1,4-dihydrobenzo-1,4-dihydrobenzene), poly(p-phenylene), poly(p-1,4-dihydrobenzene), and their hetero (N, O, and S) substituted derivativesJ. Kao and A. C. Lilly Jr.Cite this: J. Am. Chem. Soc. 1987, 109, 14, 41…
The crevice corrosion that occurs on titanium in chloride solutions at elevated temperatures can constitute a serious problem. The resistance of three titanium materials to this form of corrosion has been evaluated by immersion and electrochemical tests. The results show that all three possess superior corrosion resis…
Abstract Bis(dimethylsulfoxonium methylide)gold chloride, [(CH3)2S(O)CH2AuCH2S(O)(CH3)2]Cl, has been studied by X-ray photoelectron spectroscopy. The C 1s spectrum was separated into two peaks at EB=284.0 and 285.1 eV in a ratio of 1:2. The peak at 285.1 eV corresponds to the methyl carbons, and that at 284.0 eV is as…
Synthetic diamonds with controlled amounts of impurity atoms can be manufactured so that, as thermoluminescent dosimeters, they can be made to have sensitivities at least as good as presently available commercial thermoluminescent dosimeters. They also exhibit, for radiations normally found in therapy situations, a li…
Abstract Opal‐A and opal‐CT were identified by x‐ray diffraction as the primary pedogenic silica minerals in two central Nevada duric soils. Opal‐A was also present in the form of allogenic volcanic glass. Pedogenic microcrystalline quartz was not identified. Saturated paste extracts contained > 60 mg L −1 Si(OH) 4…
The processing of thin-film semiconducting, optical, and electronic materials by spray pyrolysis processing is reviewed. The major processing parameters, equipment, and chemical solutions utilized in the deposition of sulfides, selenides, oxides, and ternary semiconducting compounds are described in relation to the po…
We present a model for the bonding of CO adsorbed on alkali-promoted surfaces that accounts for differences in experimental observations between the singly and coadsorbed systems. Theoretical evidence indicates that the interaction between the alkali metal and the CO on the surface is local and dominantly an ionic one…
X-ray diffraction intensities were measured from a BeO single crystal with wurtzite structure specially treated to reduce extinction effects. Preliminary least-squares refinement yielded experimental structure factors on an absolute scale, corrected for extinction and anomalous dispersion, and a reference model Be2+O2…