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1Author    Masahiko Suhara, Koichi ManoRequires cookie*
 Title    NQR and Phase Transitions in Hexachlorocyclopropane Crystal  
 Abstract    35 C1 NQR and DSC studies on phase transitions in hexachlorocyclopropane (HCCP), C 3 C1 6 , are reported. It is found that HCCP has three solid phases: A high temperature disordered phase (Phase I) above 301 K (no NQR spectrum was observed); a metastable phase (Phase II), which exhibited 6 NQR lines from 77 to 270 K; a low temperature phase (Phase III) in which a 24-multiplet of 35 C1 NQR lines at 77 K, the most complex multiplet spectrum ever reported was observed. DSC measurement shows a A-type transition at 301 K and a broad transition of very slow rate at 285 K. The structure and mechanism of phase transitions in HCCP crystal are discussed. 
  Reference    Z. Naturforsch. 45a, 339—342 (1990); received August 23 1989 
  Published    1990 
  Keywords    Nuclear quadrupole resonance, Phase transition, Crystal structure, Differential scan-ning calonmetry, Order-disorder transition 
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 TEI-XML for    default:Reihe_A/45/ZNA-1990-45a-0339.pdf 
 Identifier    ZNA-1990-45a-0339 
 Volume    45