NEUTRON DIFFRACTION STUDY OF SOME RARE EARTH IRON GARNETS RIG (R = Er, Dy, Yb, Tm) F. TCHÉOU, E. F. BERTAUT et H. FUESS J. Phys. Colloques, 32 C1 (1971) C1-202-C1-204 DOI: 10.1051/jphyscol:1971162