A STUDY OF IRON IMPURITY IN SILVER CHLORIDE USING MAINLY THE MOSSBAUER EFFECT,
Abstract
The Mossbauer effect was investigated as a function of temperature between 4K and 550K for sources of Cobalt-57 impurity diffused into single crystal silver chloride. Auxiliary measurements of ionic conductivity, optical absorption, E.S.R. and dielectric dispersion were also made. The Mossbauer spectrum of a freshly prepared sample is attributed to a ferrous ion in a substitutional site bound to a positive ion vacancy in a unique (100) position. Between 4K and 230K a simple quadrupole doublet is observed which is interpreted to show a measure of covalency in the ferrous ion. Above 230K the spectral lines broaden and the spectrum collapses to a single line; it is proposed that this effect is a result of the thermal motion of the vacancy around the impurity. The deduced vacancy jump times are shown to agree with those derived from dielectric dispersion measurements. Aged samples have complex Mossbauer spectra which are explained by the formation of additional centers of ferrous ions bound to anion impurities. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1965
- Accession Number
- AD0627180
Entities
People
- D. H. Lindley
- P. G. Debrunner
Organizations
- University of Illinois Urbana–Champaign