MAGNETIC DIPOLAR AND ELECTRIC QUADRUPOLE EFFECTS ON THE MÖSSBAUER SPECTRA OF MAGNETITE ABOVE THE VERWEY TRANSITION L. Häggström, H. Annersten, T. Ericsson, R. Wäppling, W. Karner and S. Bjarman J. Phys. Colloques, 40 C2 (1979) C2-327 DOI: 10.1051/jphyscol:19792115