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Solid-State 87Rb NMR study in powdered RbMnCl3

Title
Solid-State 87Rb NMR study in powdered RbMnCl3
Authors
Woo A.J.Park Y.S.Jeong S.-Y.
Ewha Authors
우애자
SCOPUS Author ID
우애자scopus
Issue Date
2000
Journal Title
Solid State Nuclear Magnetic Resonance
ISSN
0926-2040JCR Link
Citation
vol. 17, no. 1-4, pp. 15 - 21
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Structural phase transition at 290 K and the implication on the intermediate phase above 290 K in powdered RbMnCl3 are observed by using a solid-state 87Rb NMR spectroscopy. Quadrupole coupling constants (e2qQ/h), the asymmetry parameters (η), and the relative peak intensities for two physically nonequivalent Rb sites, Rb(I) and Rb(II), are determined from nonlinear least-squares fits to the 87Rb NMR powder patterns in the temperature range from 260 to 330 K. Quadrupole coupling constants and the asymmetry parameters are examined for the detection of the phase transition resulting in a significant structural change in the Rb(II) site. In addition, changes in the relative peak intensity between the Rb(I) and Rb(II) sites seem to suggest the existence of an anomalous intermediate phase, which is complemented by the differential scanning calorimetry and X-ray diffraction studies. © 2000 Academic Press.
DOI
10.1006/snmr.2000.0002
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사범대학 > 과학교육과 > Journal papers
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