MAGNETIC AND STRUCTURAL TRANSITIONS IN THE 2-D SYSTEM Rb2CrxMn1-xCl4 : A RAMAN STUDY P. Moch, A. T. Abdalian, C. Dugautier, B. Briat et M. Nerozzi J. Phys. Colloques, 49 C8 (1988) C8-1503-C8-1504 DOI: 10.1051/jphyscol:19888692