MÖSSBAUER STUDY OF 57Fe IN THE PYRITE-TYPE DICHALCOGENIDES - ISOMER SHIFT OF DIVALENT IRON IN LOW SPIN STATE Y. Nishihara et S. Ogawa J. Phys. Colloques, 40 C2 (1979) C2-297-C2-298 DOI: 10.1051/jphyscol:19792103