AN EXTRAORDINARY LARGE QUADRUPOLE SPLITTING OBSERVED IN A GOLD1(d10) COMPOUND M. P. A. VIEGERS, J. M. TROOSTER, G. VAN KOTEN et J. G. NOLTES J. Phys. Colloques, 37 C6 (1976) C6-524 DOI: 10.1051/jphyscol:19766109