Khibinskite, K2ZrSi2O7, a new mineral
(1974). Khibinskite, K2ZrSi2O7, a new mineral. International Geology Review: Vol. 16, No. 11, pp. 1220-1226.
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Dynamische Kernpolarisation und zwischenmolekulare Wechselwirkungen in phosphor- und thalliumorganischen Lösungen
Article Dynamische Kernpolarisation und zwischenmolekulare Wechselwirkungen in phosphor- und thalliumorganischen Lösungen was published on November 1, 1974 in the journal Zeitschrift für Physikalische Chemie (volume 93, issue 1-6).
Serendibite, a Complicated, New, Inorganic Crystal Structure
Serendibite with very similar analyses is known from Ceylon and New York. The triclinic cell of symmetry P[unk] and volume 670.9 A(3) contains 2Ca(1.64)Mg(2.64)Fe(0.27) (II)Al(4.64)B(1.66)Si(3)O(20), with 14 metal atoms and 20 oxygen atoms in the asymmetric unit. It was solved by the "direct" method of transforming th…
Crystallization kinetics of polyethylene under high pressure
Abstract The kinetics of isothermal crystallization of polyethylene under high pressures ranging from 840 to 5300 kg/cm 2 has been studied dilatometrically. The crystallization rate estimated from the half‐time of the overall transformation increases markedly with pressure. The Avrami exponent n becomes smaller with i…
Das Gleichgewicht PbCl2,g + ThCl4,g = PbThCl6,g und die Sättigungsdrucke von PbCl2 und ThCl4
Abstract Das Gleichgewicht PbCl 2,g + ThCl 4,g = PbThCl 6,g wurde mit der Knudsen‐Methode massenspektroskopisch gemessen. Mit Einführung von ΔS°(298) = −36 cl und °Cp = 4 cal/°, Mol ergibt sich ΔH°(298) = −32,0 kcal/Mol. Ferner wurden die Sättigungsdrucke über PbCl 2,f und ThCl 4,f gemessen und mit Literaturangaben in…
A redetermination of the crystal structure of cosalite, Pb 2 Bi 2 S 5
Article A redetermination of the crystal structure of cosalite, Pb2Bi2S5 was published on November 1, 1974 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 140, issue 1-2).
Pressure enhanced superconductivity in NbSe2
The pressure dependence of the superconducting transition temperature for the layer compounds h-Nb 1+x Se 2 (x=0, 0.01, 0.02, 0.05 and 0.1) and 4H-NbSe 2 has been investigated to 25 kbar. A strong enhancement of T c is observed. A brief discussion of the influence of pressure upon the band structure and its relationsh…
The intrinsic viscosity of poly(acrylic acid) at different ionic strengths: Random coil and rigid rod behaviour
Abstract The intrinsic viscosities of low molecular weight fractions of atactic poly(acrylic acid) at 50% and 100% neutralization and at several concentrations of added sodium chloride is studied. In salt‐free solutions the 100% neutralized polymer assumes the rigid rod form. The results at concentrations of sodium ch…
Measurement of Sliver Drafting Forces
A staple draftometer is described using a "Hall Effect" wattmeter as the transducer for measuring dynamic forces in staple slivers during drafting. The procedure for calibration and use of the instrument is also given. A novel feature of the apparatus is the use of a decade resistance box to calibrate the desired full…
Fragmentation of Uranium Dioxide after Molten Uranium Dioxide-Sodium Interaction
A series of 30 runs were performed to gain information on the fragmentation of molten UO2when dropped into a bath of liquid sodium. In this experiment, hollow cylindrical UO2 pellets were heated with electric current fed to a tungsten rod, passed through to center hole. The resulting molten UO2 dripped down its fall i…
Strukturelle und spektroskopische Untersuchungen am Ba 2 CuTeO 6
Abstract Die röntgenographische Einkristall‐Strukturuntersuchung zeigt, daß Ba 2 CuTeO 6 bei Zimmertemperatur in einer triklinen JAHN‐TELLER‐Variante des hexagonalen Ba 2 NiTeO 6 ‐Typs (12‐Schichten‐Struktur) kristallisiert: equation image Gruppierungen aus drei flächenverknüpften Oktaedern sind über ausschließlich ec…
Magnetostriction Measurement by Three Terminal Capacitance Method
The saturation magnetostriction constants λ 100 and λ 111 of YIG and Fe (1- x ) Al x ( x =0.17, 0.20, 0.23, 0.25) single crystals were measured by a capacitance method at room temperature. The capacitance cell used in this experiment was designed to be convenient for measuring the constants of spherical samples from 0…
Stopping-cross-section additivity for 1-2-MeV He + 4 in solid oxides
The stopping of 1-2-MeV α particles in five solid oxides, MgO, Al2O3, SiO2, α-Fe2O3, and Fe3O4, has been investigated by measuring the ratios of the elastically-back-scattered-particle yields from two-layered metal-oxide and metal-metal targets. By applying a self-consistent analytical procedure, it is demonstrated th…
Three Phase Transformer Transients
This paper describes an electromaanetic circuit model of three ohase transformers capable of includina ferromacanetic non-linear effects includinga hvsteresis, suitable for anv number of windinas with a variety of interphase connections and applicable to any magnetic circuit confiauration. In particular, three of the…
Rubber networks containing unattached macromolecules. I. Linear viscoelastic properties of the system butyl rubber–polyisobutylene
Abstract Mixtures of butyl rubber with polyisobutylene (molecular weights 0.055 and 2.3 × 10 6 ) up to 50% by weight were crosslinked by sulfur, leaving the polyisobutylene molecules free to reptate in the butyl rubber network. Linear viscoelastic properties were measured in shear creep for periods up to 5 × 10 5 sec…
Autoionization Spectra of Magnesium (Mg i, MG ii, and MG Iii) in the 50- to 110-eV Energy Range
A total of 68 resonances have been identified in the absorption spectrum of magnesium; 24 of them belong to the neutral atom and were almost entirely classified previously. In this paper we report for the first time 38 lines of singly ionized magnesium and a Rydberg series with six members corresponding to Mg iii leve…
Dc Conductivity of Ge‐S‐Ag and As‐S‐Ag Glasses
The dc conductivity in GeS 2 ‐GeS‐Ag 2 S and As 2 S 3 ‐Ag 2 S glasses was measured over the range – 20° to 80°C using an electrode of 1 at.% Ag amalgam to avoid polarization. The room‐temperature conductivity varies with increasing Ag 2 S content from 10 −15 to 10 −4 Ω −1 cm −1 for GeS 2 ‐GeS‐Ag 2 S glasses and from 1…
Transition metal eight-coordination. VI. Isomerization through electronic and environmental effects. Electron spin resonance, magnetic circular dishroism and electronic spectra of octacyanotungstate(IV) and (V)
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTransition metal eight-coordination. VI. Isomerization through electronic and environmental effects. Electron spin resonance, magnetic circular dishroism and electronic spectra of octacyanotungstate(IV) and (V)Robert A. Pribush and Ronald D. ArcherCite this: Inorg. Chem. 197…
The grüneisen constant of polymers
Abstract A method based on the pressure dependence of the bulk modulus was developed for determnining the Lattice Grüneisen Constant, γL, of polymers. This technique was applied to a series of polymers and the results indicated that γL for most polymers lies between 4 and 9. These results were discussed in terms of th…
Alignment of nematics and smectics on evaporated films
We discuss the alignment of nematics and smectics on substrates where an obliquely evaporated thin film has been previously deposited. In the planar samples, the surface anchoring energy is substantially larger than with the traditional rubbing technique. We can also uniformly align the liquid crystals obliquely, in p…