X-Ray Powder Data for Acetaminophen (C 8 H 9 NO 2 )
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.
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Relations between Structure, Bonding, and Nature of Point Defects in Layered Crystals of Tetradymite Structure
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…
Verfolgung der Vernetzung und Charakterisierung von modifizierten Epoxidharzen mittels Ultraschalluntersuchungen
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…
Solid oxide fuel cell technology
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…
Steric and electronic interactions between cofacial metallocene rings
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…
Determination of crystal structures with large known fragments directly from measured X-ray powder diffraction intensities
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…
Full configuration interaction benchmark calculations for titanium monohydride
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…
Investigation of space charge in low-density polyethylene using a field probe technique
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…
Kinetics of crystal growth of calcium sulfate dihydrate. The influence of polymer composition, molecular weight, and solution pH
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 Irradiated UO2and UO2-2wt%Gd2O3Fuel Pellets up to Burnup of about 30 GWd/tU
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…
The influence of point defects on selected properties of PbTio3crystals
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 Low-angle X-ray Atomic Scattering Factors Measured by the Critical Voltage Effect in High Energy Electron Diffraction
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…
Raman spectra of the lanthanide oxalates
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…
Zur Kenntnis von Alkalimetaselenoarseniten Darstellung und Kristallstrukturen von MAsSe2, M = K, Rb, Cs
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 ‐…
Central Softening by Crystallization in a Fluidized‐Bed Process
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…
Impedance Study on Inhibition and Stimulation of Iron Corrosion in Acid Solution by Various Inorganic Anions and Tetra‐alkylammonium Cation
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…
Chemistry and mineralogy of Fe‐containing oxides and layer silicates in relation to plant available iron
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…
Polymeric phthalocyanines and their precursors, 15. Syntheses of alkylenedioxy bridged polymeric phthalocyanines and their absorption capacities for organic solvents in comparison to other phthalocyanines
Abstract Alkylenedioxy bridged polymeric phthalocyanines 3a – d were synthesized by the reaction of the tetracarbonitriles 2a–d with copper(II) chloride or copper in bulk. As compared with other tetracarbonitriles the reactions applying 2a – d, which contain a flexible alkylene chain, run at relatively low reaction te…
Synthesis, x-ray crystal structure, and multinuclear NMR study of the dynamic behavior of tris[dihydrobis(1-pyrazolyl)borato]yttrium(III); a molecule with three three-center, two-electron bonds
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis, x-ray crystal structure, and multinuclear NMR study of the dynamic behavior of tris[dihydrobis(1-pyrazolyl)borato]yttrium(III); a molecule with three three-center, two-electron bondsDaniel L. Reger, Jeffrey A. Lindeman, and Lukasz LebiodaCite this: Inorg. Chem. 19…
Dynamic shear modulus and fabric: part I, depositional and induced anisotropy
A torsional simple shear-resonant column device was used to perform experiments on hollow cylindrical samples consisting of glass spheres with two different diameters. The purpose of the investigat...