Materials Literature
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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…
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…
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…
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...
Two new bis adducts were obtained by reaction of manganese hexafluoroacetylacetonate, Mn(hfac),, with the nitronyl nitroxide ligands 2,4,4,5,5-pentamethyl-4,5-dihydr1oH-- imidazolyl- 1-oxy 3-oxide, NITMe, and 2-phenyl-4,4,5,5-tetramethyl-4,5-dihydro- 1H-imidazolyl-1-oxy 3-oxide, NITPh. The X-ray crystal structure show…
Small-scattering-wave-vector structure-factor measurements have been made for model hard-sphere suspensions undergoing a steady linear shear flow. The samples are comprised of sterically stabilized silica particles in cyclohexane and have been well characterized previously by rheological, light scattering, and neutron…
The thermoelastic martensitic transformation in shape-memory alloys is studied thermodynamically. Calorimetric experiments on the Cu─Zn─A1 alloy system reveal that the transformation takes place with a practically negligible entropy production. The usual hysteretic subloop behaviour during partial cycling is obtained…
The sinterability of Al 2 O 3 /ZrO 2 composite powder compacts containing 2 and 10 vol% ZrO 2 was compared to the sinterability of their single‐phase constituents through constant‐heating‐rate experiments. The ZrO 2 inclusion phase delayed the initiation of bulk shrinkage and the temperature of maximum strain rate by…
Abstract The miscibility of polyester/nitrocellulose blends was investigated by differential scanning calorimetry and Fourier‐transform infrared (FTIR) spectroscopy. Two nitrocelluloses (NC) derived from wood and having different nitrogen contents (12.62 and 13.42%) were used. On the basis of the glass transition temp…