127I Mössbauer spectra of good quality were obtained at 20 K using a Zn127mTe source produced by high flux neutron irradiation of 66Zn-126Te at reactor core. The Mössbauer spectra for KI and some iodine(III) compounds with absorption intensity of about 5% suggest that the 127I Mössbauer spectroscopy is useful in elucidating the bonding nature of the iodine compounds. Preparative method of the Mössbauer source and experimental technique are reported in detail.