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AbstractAbstract
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Physical Review Letters; v. 28(16); p. 1028-1031
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Journal of Solid State Chemistry; v. 4(2); p. 324-330
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No abstract available
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Materials Research Bulletin; v. 7(5); p. 369-380
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O termicheskom povedenii disul'fida reniya v vakuume
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Vestnik Akademii Nauk Kazakhskoj SSR; (no. 3); p. 66-69
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No abstract available
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Journal of Solid State Chemistry; v. 5(2); p. 262-265
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Pauls, D.; Schubert, G.; Lorenz, R.
VEB Mansfeld Kombinat Wilhelm Pieck, Lutherstadt Eisleben (German Democratic Republic)1988
VEB Mansfeld Kombinat Wilhelm Pieck, Lutherstadt Eisleben (German Democratic Republic)1988
AbstractAbstract
[en] A method for processing perrhenate-containing salt suspensions with 3 - 5 per cent organically bonded carbon in the form of humic acids is described. It aims at limiting the influence of the organic components to an extent that guarantees an increased rhenium recovery with the final product recovered being of high purity
Original Title
Verfahren zur Verarbeitung perrhenathaltiger Salzsuspensionen
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Source
20 Jul 1988; 24 Mar 1986; 4 p; DD PATENT DOCUMENT 258336/A3/; ?: 24 Mar 1986
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Patent
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AbstractAbstract
No abstract available
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Oak Ridge National Lab., Tenn. (USA); p. 104-106; Aug 1972
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Report
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AbstractAbstract
No abstract available
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Phys. Rev., B; v. 6(10); p. 3620-3623
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AbstractAbstract
[en] Measurements of the proton spin-lattice relaxation time, T1, in polycrystalline NH4ReO4 have shown that mechanical sample rotation in the static magnetic field reduces T1 for proton magnetic resonance frequenies wihtin the range 30 - 42 MHz. The rotation induced proton spin-lattice relaxation times, T'1, were measured at different Larmor frequencies, sample rotation frequencies, and temperatures. At room temperature T'1 increases with increasing proton Larmor frquency. The dependence of T'1 on sample rotation frequency and temperature is small. The 'normal' proton T1 times were deterimed as a function as of temperature at 30 and 42 MHz. From these measurements an average activation energy of 2.4 kcal/mole was obtained for the NH4+ reorientation. The 'normal' spin-lattice relaxation behavior was observed to be non-exponential at 30 MHz above 200 K and at MHz above 260 K and is nearly independent on temperature above 300 K. (orig.)
[de]
Messungen der Proton-Spin-Gitter-Relaxationszeit T1 in polykristallinem NH4ReO4 haben gezeigt, dass die mechanische Rotation der Proben im statischen Magnetfeld die Relaxationszeit T1 fuer Proton-Resonanzfrequenzen zwischen 30 - 42 MHz verringert. Die rotationsinduzierten Proton-Spin-Gitter-Relaxationszeiten T'1 wurden bei verschiedenen Lamorfrequenzen, Rotationsfrequenzen und Temperaturen gemessen. Bei Raumtemperatur nimmt T'1 mit ansteigender Larmorfrequenz zu. T'1 haengt nur schwach von der Rotationsfrequenz der Probe und der Temperature ab. Die 'normalen' Proton-Relaxationszeiten T1 wurden als Funktion der Temperatur bei 30 und 45 MHz bestimmt. Aus diesen Messungen wurde fuer die NH4+-Orientierung eine mittlere Aktivierungsenergie von 2,4 kcal/Mol bestimmt. Bei 30 MHz ueber 200 K und bei 42 MHz ueber 260 K zeigt die 'normale' Spin-Gitter-Relaxation kein exponentielles Verhalten, ueber 300 K findet man fast keine Temperaturabhaengigkeit. (orig.)Source
1 fig.; 1 tab.; 12 refs.
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Journal Article
Journal
Zeitschrift fuer Naturforschung. Teil A, Physik, Physikalische Chemie, Kosmophysik; v. 31(12); p. 1707-1710
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Allpress, J.G.; Iijima, S.
Solid state chemistry division symposium, Flinders University, 22-25 May 19721972
Solid state chemistry division symposium, Flinders University, 22-25 May 19721972
AbstractAbstract
No abstract available
Secondary Subject
Source
Royal Australian Chemical Inst., Parkville; p. 1; 1972; Solid state chemistry symposium; Adelaide, Australia; 22 May 1972; Presented in abstract form only.
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Report
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