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Title: Peculiarities in the Raman spectra of ZrB{sub 12} and LuB{sub 12} single crystals

Journal Article · · Journal of Solid State Chemistry
 [1];  [2];  [2];  [2];  [3];  [4];  [4]
  1. Institute of Physics, University Duisburg-Essen, Campus Duisburg, 47048 Duisburg, Bensberger Marktweg 328, D-51069 Cologne (Germany)
  2. I.N.Frantsevich Institute for Problems of Materials Science of NASU, 3 Krzhyzhanovsky Street, 03142 Kiev (Ukraine)
  3. Institute of Low Temperatures and Structure Research, Wroclaw (Poland)
  4. Max-Plank-Institut fuer Chemische Physik fester Stoffe, Noethnitzer Street 40, 01187 Dresden (Germany)

We have measured Raman spectra of high-quality Zr{sup nat}B{sub 12}, Lu{sup nat}B{sub 12} and Lu{sup 11}B{sub 12} single crystals with high resolution, and the observed strong peaks are attributed to specific vibration modes. Besides, there are a number of additional Raman peaks in spectral ranges, where only Raman-inactive vibrations of the atomic arrangement are expected. Accordingly, it is assumed, that the investigated crystals contain intrinsic structural imperfections or distortions in sufficient concentration and efficiency to initiate the observed breaking of phonon selection rules. We suppose boron vacancies, boron isotope effects and displacements of the metal atoms to be reasons for such imperfections. - Graphical abstract: Raman spectra of Lu{sup nat}B{sub 12}, Lu{sup 11}B{sub 12} and Zr{sup nat}B{sub 12}.

OSTI ID:
20905435
Journal Information:
Journal of Solid State Chemistry, Vol. 179, Issue 9; Conference: 15. international symposium on boron, borides and related compounds, Hamburg (Germany), 21-26 Aug 2005; Other Information: DOI: 10.1016/j.jssc.2005.11.034; PII: S0022-4596(05)00574-8; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
Country of Publication:
United States
Language:
English

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