ANOMALOUS LINE SHAPES OF Fe3+ -MÖSSBAUER SPECTRA IN MAGNETICALLY ORDERED SYSTEMS — EFFECTS OF HEAT TREATMENT IMPURITY IONS AND Fe3+ ION-CONCENTRATION J. K. SRIVASTAVA et R. P. SHARMAJ. Phys. Colloques, 35 C6 (1974) C6-663-C6-668DOI: https://doi.org/10.1051/jphyscol:19746146