An Interpretation of the Isomorphous Transition in SnCl₂·2H₂O

Abstract

A tentative interpretation of the isomorphous transition in SnCl₂·2H₂O crystal is shown. The Landau-type thermodynamic potential is proposed, which contains odd-order terms in sublattice polarization in addition to those commonly allowed. Temperature dependences of electric susceptibility and specific heat are derived and discussed. Appearance of the critical point is mentioned.