MAGNETIC BEHAVIOR OF Co2+ IONS IN SYNTHETIC MINERALS RELATED TO VIVIANITE AND LUDLAMITE J. L. Pizarro, L. Lezama, G. Villeneuve, M. I. Arriortua et T. RojoJ. Phys. Colloques, 49 C8 (1988) C8-2063-C8-2064DOI: https://doi.org/10.1051/jphyscol:19888935