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1999 (1)
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1Author    Haruaki Matsuura, Isao Okada, Ryuzo Takagi, Yasuhiko IwadateRequires cookie*
 Title    Internal Cation Mobilities in Molten (K, Dy 1/3 )C1  
 Abstract    Internal cation mobility ratios in the molten system KCl-DyCl 3 have been measured at 1093 K by Klemm's countercurrent electromigration method. From these, and data available on the con-ductivities and molar volumes of the mixtures, the internal mobilities b of both cations have been calculated. With increasing concentration of Dy, b K decreases. The decrease of b K is attributed to the tranquilization effect by Dy 3+ ions which strongly interact with Cl~ ions. With increasing concentration of K + , b Dy decreases; this may be attributed to the stronger association of Dy 3+ with CP ions due to the enhanced charge asymmetry of the two cations neighboring to the CP ions. It could not been clarified whether a species such as [DyCl 6 ] 3_ is also an electrically-conducting species in the K + rich range. 
  Reference    Z. Naturforsch. 53a, 45—50 (1998); received August 19 1997 
  Published    1998 
  Keywords    Klemm Method, Internal Mobilities, Molten DyCl 3, Tranquilization Effect 
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 TEI-XML for    default:Reihe_A/53/ZNA-1998-53a-0045.pdf 
 Identifier    ZNA-1998-53a-0045 
 Volume    53 
2Author    Pao-Hwa Chou, Ryuzo Takagi, Isao OkadaRequires cookie*
 Title    Internal Mobilities in the Molten Ternary System (Li,K,Cs)N0 3 of the Eutectic Composition  
 Abstract    The e values in the internal cation mobilities of (Li,K,Cs)N0 3 of the eutectic composition (35.2-39.8-25.0 mol%) in the temperature range from 453 to 673 K were measured by Klemm's countercurrent electromigration method, where e is defined as (bj-6j)/6 a ; b. d is the average internal cation mobility and the subscripts i and j refer to any two out of these three cations. The conductivity was measured by a direct current method. From these data and the molar volume calculated from those of the pure salts on the assumption of additivity, the internal cation mobilities, b Ll , b K and b Cs , have been calculated. The b u is well expressed by the empirical equation presented for binary alkali nitrates; the negative devia-tion for b K and b Cs may be accounted for on the assumption of the tranquilization effect of Li + . The or-ders of those internal cation mobilities are b Cs <b K <b Li at 453^73 K, b Cs <b Li <b K at 473 -583 K, and b u <b Cs <b K at 583-673 K. These orders can be interpreted in terms of the dynamic dissociation mod-el previously presented. 
  Reference    Z. Naturforsch. 54a, 329—334 (1999); received June 12 1998 
  Published    1999 
  Keywords    Internal Mobility, Molten (Li,K,Cs)N0 3, Dynamic Dissociation Model 
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 TEI-XML for    default:Reihe_A/54/ZNA-1999-54a-0329.pdf 
 Identifier    ZNA-1999-54a-0329 
 Volume    54 
3Author    P.-H Chou, I. OkadaRequires cookie*
 Title    Internal Mobilities in the Molten Binary Systems (Tl, K)N0 3 and (Tl, Cs)N0 3  
 Abstract    Ratios of internal cation mobilities in the molten binary systems (Tl, K)NO a and (Tl, Cs)N0 3 have been measured by the Klemm method. From these and the data available on the densities and electric conductivities, the internal mobilities b have been calculated. While generally in the mixtures of T1N0 3 with alkali nitrates at constant temperature the conductivities and internal mobilities decrease with increasing molar volume, in (Tl, K)N0 3 they decrease with decreasing molar volume. This is explained by the high polarizability of the Tl + ions. 
  Reference    Z. Naturforsch. 52a, 441—446 (1997); received March 3 1996 
  Published    1997 
  Keywords    Internal mobility, Klemm method, molten (Tl, K)N0 3, molten (Tl, Cs)N0 3, high polar-izability 
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 TEI-XML for    default:Reihe_A/52/ZNA-1997-52a-0441.pdf 
 Identifier    ZNA-1997-52a-0441 
 Volume    52