PARAMAGNETIC HYPERFINE STRUCTURE AND ELECTRONIC RELAXATION OF Fe2+ IN CaCO3 AND CdCO3 D. C. PRICE et K. K. P. SRIVASTAVA J. Phys. Colloques, 37 C6 (1976) C6-123-C6-127 DOI: 10.1051/jphyscol:1976629