Abstract
Te 125 Mössbauer spectra of Se 0.98 Te 0.02 alloy in bulk amorphous and trigonal phases reveal partially resolved quadrupole doublets. The average quadrupole splitting in the amorphous phase is found to be 10 per cent larger. This observation, in the framework of the ring-chain model of amorphous Se suggests a substantially larger quadrupole interaction at Te 125 sites in mixed rings than in copolymeric chains. The strength of the quadrupole interaction in mixed rings and copolymetric chains is found to be 12.72 ± 0.40 mm/sec and 10.33 ± 0.08 mm/sec. Implications of these results on the chemical bonding are discussed.
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