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'displacement modulation' in keywords Facet   Publication Year 1990  [X]
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1Author    J. Pirnat, J. Lužnik, Z. Trontelj, P. K. KadabaRequires cookie*
 Title    Iodine NQR and Phase Transitions in [N(CH 3 ) 4 ] 2 ZnI 4 * a  
 Abstract    Using a superregenerative NQR spectrometer, the temperature dependence of 127 I NQR spectra in [N(CH 3) 4 ] 2 ZnI 4 was measured between 167 and 335 K. The measurements confirm two known structural phase transitions at 219 and 257.5 K. The correspondence between the distinct regions of iodine NQR spectra and the crystal structure is discussed. The relation of [N(CH 3) 4 ] 2 ZnI 4 to the incommensurate family with the general formula X 2 YZ 4 and the high temperature (paraphase) crystal space group D^ (Pmcn) is studied. 
  Reference    Z. Naturforsch. 45a, 349—352 (1990); received August 23 1989 in revised form 25 November 1989 
  Published    1990 
  Keywords    NQR, phase transitions, ferroelectric, crystal structure, displacement modulation 
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 TEI-XML for    default:Reihe_A/45/ZNA-1990-45a-0349.pdf 
 Identifier    ZNA-1990-45a-0349 
 Volume    45