Mass Spectrometric Investigation of the Vapor over the LnCl_3-KCl Equimolar Melt (Ln=Nd, Er) at High Temperatures

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Author(s)

    • MURASE Kuniaki
    • Department of Applied Chemistry, Faculty of Engineering, Osaka University
    • ADACHI Gin-ya
    • Department of Applied Chemistry, Faculty of Engineering, Osaka University
    • KUDO Hiroshi
    • Department of Chemistry, Graduate School of Science, Tohoku University

Abstract

Vaporization of the LnCl<sub>3</sub>–KCl (Ln = Nd and/or Er) equimolar molten mixture was investigated at 1018—1273 K by means of Knudsen effusion mass spectrometry. The vapor species KCl, K<sub>2</sub>Cl<sub>2</sub>, NdCl<sub>3</sub>, and KLnCl<sub>4</sub> were found in the vapor over the melt, and their vapor pressures were evaluated for the NdCl<sub>3</sub>–KCl system. Volatility enhancement of NdCl<sub>3</sub> by the formation of the vapor complex KNdCl<sub>4</sub> decreases with increase in temperature. A relatively small enthalpy change, −10 ± 21 kJ mol<sup>−1</sup>, of the isomolecular exchange KNdCl<sub>4</sub>(g) + KCl(g) = NdCl<sub>3</sub>(g) + K<sub>2</sub>Cl<sub>2</sub>(g) suggests that the structural change of the reaction is not drastic and that the KNdCl<sub>4</sub>(g) complex has two bridging and two terminal chlorine atoms.

Journal

  • Bulletin of the Chemical Society of Japan

    Bulletin of the Chemical Society of Japan 69(2), 353-357, 1996-02-15

    The Chemical Society of Japan

References:  26

Codes

  • NII Article ID (NAID)
    10008899388
  • NII NACSIS-CAT ID (NCID)
    AA00580132
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    00092673
  • Data Source
    CJP  J-STAGE 
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