Materials Literature
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The static Debye-Waller factor and its dependence on the crystal perfection have been obtained through the detailed analysis of the intensity distribution in X-ray diffraction topograph for heat-treated Cz-silicon crystals. The size and density of oxygen precipitates have been determined using the experimental and cal…
Patterned aluminum films are used as conductors for integrated circuits. Unless encapsulated in plastic for protection, these films are easily corroded by moisture, which can result in device failure. In humid environments, this may not fully protect the aluminum, and a means to provide, at low cost, additional protec…
A robotic work station has been constructed for automatically initiating and monitoring microscale chemical reactions. The work station consists of a robot with a general-purpose arm and interchangeable special-purpose hands, a carousel of seven reaction vessels, a series of stations for performing quantitative automa…
Abstract X-ray powder data and crystal data for acetaminophen, C 8 H 9 NO 2 , are reported and results are compared to existing PDF patterns.
Abstract A quantum chemical calculation of bonding parameters in Sb 2 Te 3 , Bi 2 Te 3 , Bi 2− x In x Te 3 , and Bi 2 Te 3− x S x single crystals is carried out. The electric conductivity σ ⟂ c and Hall constant R H ( B ∥︁ c ) of the crystals in the Bi 2 Te s− x S x system are measured. These results present a basis f…
Abstract Die Härtung von diolmodifizierten Epoxidharzen wurde mittels longitudinaler Ultraschallgeschwindigkeits‐ und Dämpfungsmessungen verfolgt. Aus der Zeitabhängigkeit der akustischen Parameter können der Gelpunkt, der dynamische Glasübergang und das Ende der Vernetzungsreaktion für verschiedene Harze bestimmt wer…
The use of high-temperature solid oxide fuel cell (SOFC) systems is discussed. Such cells show great promise for economical production of electricity and heat in a variety of commercial, industrial cogeneration, and electric utility systems applications. Pioneered by Westinghouse in the 1960s, this technology is based…
As part of a study of interactions between metallocenes, held so that two cyclopentadienyl rings are constrained to be proximate and facing one another, 1,8-diruthenocenylnaphthalene (1b) has been prepared and its crystal structure has been determined. This structure is shown to be close to that of 1,8-diferrocenylnap…
A strategy for the determination of crystal structures with large known fragments directly from measured X-ray powder diffraction intensities is presented. It is based on the automated full-symmetry Patterson search method described by Rius & Miravitlles [J. Appl. Cryst. (1987). 20, 261–269] where the Fourier coeffici…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFull configuration interaction benchmark calculations for titanium monohydrideCharles W. Bauschlicher Jr.Cite this: J. Phys. Chem. 1988, 92, 11, 3020–3023Publication Date (Print):June 1, 1988Publication History Published online1 May 2002Published inissue 1 June 1988https://p…
A test method that uses a capacitive field probe to investigate the space charge distribution in low-density polyethylene (LDPE) is described. Specimens of 7-mm thickness were stressed under 100 kV DC at room temperature and for different time periods. The results indicate that the LDPE insulation layer between electr…
A seeded crystal growth technique has been used to study the influence of solution pH and temperature ranging from 25 to 50 °C on the performance of polymers of varying functional groups as calcium sulfate dihydrate (CaSO 4• 2H 2 O, gypsum) crystal growth inhibitors. Results indicate that at constant temperature and a…
Melting temperature of UO2 and UO2-2w/oGd2O3 fuels irradiated in a commercial LWR were determined by a thermal arrest technique in a burnup range up to approximately 30GWd/tU. No decrease in the melting temperature was observed on both UO2 and UO2-2w/oGd2O3 fuels with increment of burnup to 30GWd/tU. It was also found…
Point defects exert an important influence on the physical properties of crystals. The presence of defects may cause colouration of crystals and increase in their electric conductivity making technical application of these crystals difficult or even impossible. In this paper several possibilities of point defects form…
A summary of all the accurate (-0.1%) low-angle X-ray atomic scattering (form) factors for cubic and hexagonal close-packed elements which have been determined by the critical voltage technique in high energy electron diffraction (HEED) is presented. For low atomic number elements (Z ~ 40) the low-angle form factors c…
Abstract Raman and infrared spectral data are presented for the trivalent lanthanide sesquioxalates, M 2 (C 2 O 4 ) 3 · n H 2 O, except the promethium complex, in the region from 100 to 4000 cm −1 . These complexes were isolated by precipitation from aqueous solution using Na 2 C 2 O 4 . In addition, several commercia…
Abstract Die Metaselenoarsenite MAsSe 2 , M = K, Rb, Cs wurden durch methanolothermale Reaktion von M 2 CO 3 mit As 2 Se 3 bei einer Temperatur von 130°C dargestellt. Ihre Röntgenstrukturanalysen ergaben, daß die Verbindungen Polymetaselenoarsenit‐Anionen [AsSe 2 − ] ∞ beinhalten, in denen die Grundelemente ψ‐AsSe 3 ‐…
Water softening installations at Amsterdam (the Netherlands) Water Supply's two main drinking water treatment plants reduce hardness from 250 to 150 mg as CaCO 3 /L. In this softening process, pH is raised by adding caustic soda to produce calcium carbonate, which crystallizes on seeding grains in a fluidized bed with…
The inhibition and stimulation of anodic and cathodic processes for the iron corrosion in a solution with various inorganic anions and/or tetra‐n‐butylammonium cation, TBA + and the adsorption of these ions on the iron surface were studied by impedance and polarization measurements. The anions, Cl − , Br − , I − , , a…
This paper is a review of the structures, surface properties and reactions of Fe‐containing minerals (either natural or applied materials) which influence the availability of Fe to plants. The implications of these reactions to soil testing and plant‐growth studies are also discussed. The predominant Fe‐containing min…