THE STRUCTURE OF Yb (ND3)5.7 C. NÖLDEKE, P. DAMAY, W. PRESS, F. LECLERCQ, W. LIPPIK et M. FOUKANI J. Phys. IV France, 01 C5 (1991) C5-339-C5-344 DOI: 10.1051/jp4:1991539