Materials Literature
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The Brillouin scattering spectra of NaNO2 have been observed as a function of temperature near the two phase transition points ; normal (paraelectric)-incomensurate (antiferroelectric) and incommensurate-comensurate (ferroelectric) phase transition points. A simple temperature dependence of the Brillouin frequency shi…
From the point of view of molecular interations, an attempt has been made to classify tetrahedral molecular crstals qualitatively by using experimental data of crystal structures, the Debye characteristic temperature at O K, θD(O), assuming 6N degrees of vibrational freedom, and the transition or melting tempreratures.
The distribution of 239Pu formed in uranium dioxide during irradiation is nonuniform and changes with burnup. This implicates a burnup effect on the fuel temperature distribution.The total 239Pu concentration during irradiation and its radial distribution at end-of-life has been calculated in low-enriched UO2 fuel pel…
In the Finslerian deformation theory of ferromagnetic substances, each point (x) is endowed with the unit vector ( y) called the spin and the line-element (x,y) is taken as the independent variable. The length of y is normalized at each point, so that the direction of y alone is noticed. This is the so-called spin dir…
The Type Ck 35 steel was electrochemically charged with hydrogen. For this purpose, the testing material was electrodeposited by cadmium. Acoustic emission analyses were correlated with the conditions of hydrogen charging and the analytically measured hydrogen content. A correlation between the signals of acoustic emi…
A new highly sensitive photoconductor in a near-infrared wavelength region with a low dark decay has been developed for an electrophotographic device. The photoconductor has been created with a multilayered Se-As-Te chalcogenide glass. The structure of the photoconductive layer consists of four parts: (a) Se-rich bloc…
(1981). A preliminary model for growth of Ceratophyllum demersum L. SIL Proceedings, 1922-2010: Vol. 21, No. 3, pp. 1484-1491.
Abstract Physical and mechanical properties of poly(ε‐caprolactam) synthesized in presence of various amounts of lithium chloride are measured on compression moulded films and correlated to the molecular organization, both in the amorphous and in the crystalline regions. By increasing the amount of LiCl present in the…
Abstract Ba 2 HgS 3 (leuchtend rot) kristallisiert nach Einkristalldaten und Guinier‐Simon‐Daten orthorhombisch mit a = 8,93 1 , b = 4,35 7 , c = 17,25 7 Å, Z = 4, Raumgruppe Pnma—D . Parameter siehe Text. Nach der Strukturaufklärung (Diffraktometerdaten, 976 hkl, MoKα, R = 6,4 5 %, R W = 8.9 6 %) liegen eckenverknüpf…
Abstract Tunnelling recombination luminescence in CsI :Na crystals is studied by means of linear polarization, magnetic circular polarization, and optical detection of ESR either under or after X‐ray irradiation. Results are well interpreted in terms of a self‐trapped exciton (STE) scheme as the final emitting state o…
Tensile residual stresses induced by welding are an important factor in intergranular stress corrosion cracking (IGSCC) of Type 304 stainless steel pipes. Modified welding procedures can be used to prevent IGSCC by producing compressive residual stresses at potential crack initiation sites. This paper analyzes two pro…
Abstract. New data on the planktonic diatoms from the Gulf of Naples are presented together with those from the literature. Information is given on abundances, seasonal cycles and distributions of 183 taxa, including species, varieties and forms.
The crystal structure of the electron acceptor 2,5-difluoro-7,7,8,8-tetracyano-p-quinodimethane, 2,5-TCNQF2, has been determined by single-crystal X-ray diffraction methods. The layered crystal structure is dominated by the antiparallel coupling of cyano bond moments of symmetry-related molecules. The molecular and el…
The crystal and molecular structure of N-(4-n octyloxybenzylidene)-4'-butylaniline (80.4), C25H35NO, has been determined at room temperature partially by direct methods and completed by subsequent Fourier synthesis. The crystals belong to the triclinic system with space group P1, a=5.452(3), b=7.948(4), c=27.356(4) Å,…
The twinned crystal structure of the charge-transfer complex TTF-2,5-TCNQF2 has been determined by single-crystal X-ray diffraction techniques. From intensity measurement on one twin component, a full structural model has been developed. The model encompasses segregated stacks of TTF donors and 2,5-TCNQF2 acceptors, w…
Three conformational polymorphs of Ni(NCS)2(P(CH2CH2CN)3)2 have been synthesized and their crystal structures determined by single-crystal X-ray diffraction techniques. All three crystallize in space group P21/c: cell constants for polymorph 1, a = 13.44(2) A, b = 9.04(1) A, c = 24.45(2) A, and beta = 115.4(1) degrees…
This article describes the effect of the extrusion conditions on PVC processing, morphology, and physical properties. In agreement with several previous reports, the PVC particulate hierarchy is successively broken down during processing. In particular, the 100—150-μm PVC grains are broken down to 10-μm agglomerates a…
Abstract The new compound Na 6 Si 2 Te 6 crystallizes in the monoclinic system (space group P 2 1 /c) with a = 878.6(3) pm, b = 1278.0(4) pm, c = 886.4(3) pm, β = 119.71(5)°. The compound is isotypic to K 6 Sn 2 Te 6 , essential structure elements are [Si 2 Te 6 ] 6- anions.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHopping and delocalized electrons in class II mixed-valence oxovanadatesSubhash P. Harmalker and Michael T. PopeCite this: J. Am. Chem. Soc. 1981, 103, 24, 7381–7383Publication Date (Print):December 1, 1981Publication History Published online1 May 2002Published inissue 1 Dec…
Two types of portable instruments were developed by the former Health and Safety Laboratory of the U.S. Atomic Energy Commission to characterize external gamma radiation fields and to estimate individual exposure dose rates from major natural or fission radionuclides distributed in the soil: a pressurized ionization c…