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Ferrous/Ferric Mössbauer Analysis of Simulated Nuclear Waste Glass with and without Computer Fitting
Author(s) -
GOLDMAN DON S.,
BEWLEY DEBORAH E.
Publication year - 1985
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1985.tb10126.x
Subject(s) - ferrous , ferric , mössbauer spectroscopy , ferric iron , calibration , analytical chemistry (journal) , silicate , borosilicate glass , materials science , chemistry , mineralogy , metallurgy , mathematics , crystallography , chromatography , statistics , organic chemistry
Wet‐chemical and 57 Fe Mössbauer analyses of ferrous/ferric ratios in complex borosilicate and simple silicate glasses were compared. The results support the validity of the colorimetric wet–chemical procedure and establish a linear calibration for the Mössbauer data. The resulting correlation indicates that using area ratios from Mössbauer spectra will overestimate the proportion of ferrous iron by a factor of 1.2. The linear calibration was achieved only after statistically optimizing the peak line shape for each Mössbauer spectrum. Samples with a greater proportion of ferrous iron tended to have a greater Gaussian contribution to the peak line shape. A procedure to determine ferrous/ferric ratios from measured intensity data at three velocity locations was developed. With instrument modification, this result will lead to a substantial reduction in data collection time and the elimination of complex spectral fitting.