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1996 (1)
1994 (1)
1Author    Mineyuki Hattori, Yoshito Onoda, Tomoki Erata, M. E. Smith, Bruker Analytische, M. Esstechnik, G. M. Bh, Masakazu Hattori, Hiroshi Ohki, Ryuichi IkedaRequires cookie*
 Title    Ionic motion and Disordered Structure in the Rotator Phase of Butylammonium Chloride Studied by Temperature Dependences of 35C1 and 2HNMR  
 Abstract    Temperature dependences o f 35C1 and 2H quadrupole coupling constants and 35C1 N M R spin-lat­ tice relaxation times in polycrystalline samples were measured in the rotator phase of the butylam ­ m onium chlorides C 4H 9N H 3C1 and C4H 9N D 3C1, obtainable above the phase transition tempera­ ture o f 241 K. A rapid decrease o f the quadrupole coupling constants of both nuclei upon heating is attributed to increasing dynam ic disorder formed around the polar head. The presence of self-dif-fussion o f C P ions was revealed from the spin-spin relaxation time and resonance line-width in single crystals, and confirmed by measuring the dc electrical conductivity. 
  Reference    Z. Naturforsch. 49a, 291 (1994); received July 23 1993 
  Published    1994 
  Keywords    Solid N M R, Quadrupole coupling constant, Spin-lattice relaxation time, Self-diffusion, Rotator phase 
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 TEI-XML for    default:Reihe_A/49/ZNA-1994-49a-0291.pdf 
 Identifier    ZNA-1994-49a-0291 
 Volume    49 
2Author    Roy TärnebergRequires cookie*
 Title    Sulphate Rotator Phases in Polarised Light  
 Abstract    Li 2 S0 4 has a well defined high-conducting fee phase in the temperature range 577-860 °C, and LiNaS0 4 a bcc phase in the range of 518-614 °C. Both salts were studied in polarised light during sequences going from melt, through the cubic phase into the "room temperature" phase, and back to the cubic phase. The two cubic sulphate phases are compared with organic plastic rotator phases, especially regarding the formation of vapour snakes. 
  Reference    Z. Naturforsch. 51a, 1157—1160 (1996); received June 29 1996 
  Published    1996 
  Keywords    Plastic phases, rotator phases, vapour snake, lithium sulphate, lithium sodium sulphate 
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 TEI-XML for    default:Reihe_A/51/ZNA-1996-51a-1157_n.pdf 
 Identifier    ZNA-1996-51a-1157_n 
 Volume    51