Title of article :
Phase transition in an occupationally disordered sulfate system
Author/Authors :
Lima، نويسنده , , R.J.C and Freire، نويسنده , , P.T.C. and Sasaki، نويسنده , , J.M. and Melo-Pinto، نويسنده , , F.E.A and Filho، نويسنده , , J.Mendes and Lente، نويسنده , , M.H. and Eiras، نويسنده , , J.A، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2003
Abstract :
We have investigated the behavior of the Li1.43Cs0.57SO4 single-crystal Raman spectra and dielectric permittivity as a function of temperature. It was observed that the crystal, which is an occupationally disordered system, with orthorhombic C2v2 structure at room temperature, undergoes a phase transition at 230 K. In the new phase the SO4 tetrahedra remain in two non-equivalent sites and there is no evidence of the doubling of the unit cell.
Keywords :
E. Inelastic light scattering , A. Disordered systems , D. Dielectric response , D. phonons
Journal title :
Solid State Communications
Journal title :
Solid State Communications
