CRYSTAL FIELD AND ELECTRONIC RELAXATION EFFECTS IN Rb2NaYbF6 B. D. DUNLAP, G. R. DAVIDSON, M. EIBSCHÜTZ, H. J. GUGGENHEIM et R. C. SHERWOODJ. Phys. Colloques, 35 C6 (1974) C6-429-C6-431DOI: https://doi.org/10.1051/jphyscol:1974685