PECULIARITIES OF THE SPIN STATE AND THE DISTRIBUTION OF Fe3+ IN SODIUM BORATE GLASSES V. K. Imshennik, I. P. Suzdalev, Yu. V. Maksimov et F. J. LitterstJ. Phys. Colloques, 41 C1 (1980) C1-267-C1-268DOI: https://doi.org/10.1051/jphyscol:1980192