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'Plastic crystal Phase transition Chemical shift anisotropy' in keywords
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1996 (1)
1Author    H. Honda, M. Kenmotsu, N. Onoda-Yamamuro, H. Ohki, S. Ishimaru, R. Ikeda, Y. FurukawaRequires cookie*
 Title    N and 133 Cs Solid NMR Studies on Ionic Dynamics in Plastic CsN0 2  
 Abstract    The temperature dependence of the 15 N and 133 Cs NMR spin-lattice relaxation times, the 15 N spin-spin relaxation time, and the 1S N and 133 Cs spectra of CsNOi was observed in the plastic phase (209.2 < T < 673 K (m. p.)) and the low-temperature phase (Phase II). In Phase II we found the N07 180°-flip, which could be attributed to the anomalous increase of the heat capacity curve, and determined the activation energy of this motion to be 8.7-11.7 kJ mol -1 . The l5 N and 133 Cs spectra in this phase are inconsistent with the reported crystal structure R3m and can be explained by lower crystal symmetry. In the plastic phase we detected a new anionic motion with 11 kJ mol -1 , an isotropic N07 reorientation with 8.5-9 kJ mol -1 , and ionic self-diffusion with 47 kJ mol . The presence of ionic self-diffusion was confirmed by measuring the electrical conductivity. 
  Reference    Z. Naturforsch. 51a, 761—768 (1996); received October 24 1995 
  Published    1996 
  Keywords    |S N and 133 Cs Solid NMR, Plastic crystal Phase transition Chemical shift anisotropy, Electric field gradient 
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 TEI-XML for    default:Reihe_A/51/ZNA-1996-51a-0761.pdf 
 Identifier    ZNA-1996-51a-0761 
 Volume    51