FIRST COORDINATION SPHERE AND SPIN-STATE IN SPIN CROSS-OVER IRON AND COBALT COMPLEXES C. CARTIER, P. THUERY, M. VERDAGUER, J. ZAREMBOWITCH and A. MICHALOWICZ J. Phys. Colloques, 47 C8 (1986) C8-563-C8-568 DOI: 10.1051/jphyscol:19868105