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1996 (1)
1Author    Tsutomu Okuda, Shusaku Gotou, Toshirou Takahashi, Hiromitsu Terao, Koji YamadaRequires cookie*
 Title    Structure and Successive Phase Transitions of RGeBr 3 (R = Alkylammonium) Studied by Means of NQR  
 Abstract    A series of tribromogermanate(II) complexes RGeBr 3 (R = CH 3 NH 3 , (CH 3) 2 NH 2 , (CH 3) 4 N, C 2 H 5 NH 3 , (C 2 H 5) 4 N) have been synthesized and characterized by 81 Br NQR, AC conductivity, DTA, and X-rax diffraction. These measurements revealed the presence of successive phase transi-tions in these complexes. The crystal structures of Phases I and II in (NH 3) 4 NGeBr 3 were derived from the Rietveld analysis of powder X-ray diffraction. The electric conductivity was considerably high in CH 3 NH 3 GeBr 3 and (NH 3) 4 NGeBr 3 . The conduction mechanism is discussed on the basis of 81 Br NQR spin-lattice relaxation times and crystal structures. 
  Reference    Z. Naturforsch. 51a, 686—692 (1996); received October 10 1995 
  Published    1996 
  Keywords    81 Br NQR, T x, Phase Transition, Ionic Motion, Ionic Conductivity 
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 TEI-XML for    default:Reihe_A/51/ZNA-1996-51a-0686.pdf 
 Identifier    ZNA-1996-51a-0686 
 Volume    51