INFLUENCE OF Fe2+ CONCENTRATION ON THE MÖSSBAUER SPECTRA OF NixFe3-xO4 SYSTEM I. BUNGET, C. NISTOR et M. ROSENBERGJ. Phys. Colloques, 32 C1 (1971) C1-274-C1-275DOI: https://doi.org/10.1051/jphyscol:1971191