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Journal of Applied Physics / Volume 107 / Issue 9 / ARTICLES / Structural, Mechanical, Thermodynamic, and Optical Properties of Condensed Matter

J. Appl. Phys. 107, 093508 (2010); http://dx.doi.org/10.1063/1.3406146 (6 pages)

87Rb and 133Cs nuclear magnetic resonance study of the structural properties of mixed RbxCs2−xZnCl4 (x = 0, 1, and 2) crystals

Ae Ran Lim

Department of Science Education, Jeonju University, Jeonju 560-759, Korea

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(Received 18 February 2010; accepted 23 March 2010; published online 4 May 2010)

The structures of mixed RbxCs2−xZnCl4 (x = 0, 1, and 2) single crystals grown by using the slow evaporation method were determined with x-ray diffraction. In addition, the NMR spectra and the spin-lattice relaxation times, T1, of the 87Rb and 133Cs nuclei of the three crystals were determined by using nuclear magnetic resonance (NMR) spectroscopy. The spin-lattice relaxation times, T1, of the Cs-based compounds are very much longer than those of the Rb-based compounds. The differences between the T1 values of the Rb and Cs nuclei are due to the difference between their electric quadrupole moments. Further, we analyzed the crystallographic structures of these crystals by considering the occupation probabilities (Rb or Cs) of the two cationic sites. Our NMR experimental results confirm that there are two crystallographically inequivalent Rb sites, Rb(1) and Rb(2), in Rb2ZnCl4 and two crystallographically inequivalent Cs sites, Cs(1) and Cs(2), in Cs2ZnCl4. And, only one Rb site and only one Cs site in RbCsZnCl4 was obtained. The Cs and Rb occupation rates of each of the two available sites, A1 and A2, were determined from the NMR signals.

© 2010 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. CRYSTAL STRUCTURES
  3. EXPERIMENTAL METHOD
  4. EXPERIMENTAL RESULTS AND ANALYSIS
    1. 133Cs NMR for RbxCs2−xZnCl4 (x = 0) crystals: Cs2ZnCl4
    2. 87Rb and 133Cs NMR for RbxCs2−xZnCl4 (x = 1) crystals: RbCsZnCl4
    3. 87Rb NMR for RbxCs2−xZnCl4 (x = 2) crystals: Rb2ZnCl4
  5. DISCUSSION AND CONCLUSION

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KEYWORDS and PACS

Keywords

caesium compounds, crystal growth from solution, crystal structure, evaporation, NMR spectroscopy, quadrupole moments, rubidium compounds, spin-lattice relaxation, X-ray diffraction, zinc compounds

PACS

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3406146

PUBLICATION DATA

ISSN

0021-8979 (print)  
1089-7550 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    Y. Koyama, T. Nagata, and K. Koike, Phys. Rev. B 51, 12157 (1995).

    I. Noiret, Y. Guinet, and A. Hedoux, Phys. Rev. B 52, 13206 (1995).

    P. T. T. Wong, J. Chem. Phys. 64, 2186 (1976)JCPSA6000064000005002186000001.

    A. R. Lim, J. Appl. Phys. 106, 093522 (2009)JAPIAU000106000009093522000001.


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