ISSN:
1432-2021
Keywords:
Quadrupole splitting distribution
;
Mössbauer
;
phlogopite
;
biotite
;
annite
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Geosciences
,
Physics
Notes:
Abstract We develop the methodology of quadrupole splitting distribution (QSD) analysis by evaluating the influences of absorber thickness, absorber texture, and the asumed Lorentzian width on the extracted QSD. We then present the first study to describe the Mössbauer spectra of members of a mineral family in terms of QSDs. The Fe2+ QSD and its characteristics (average QS, peak QS, skewness, and standard deviation) show gradual trends with changing Fe/(Fe+Mg) in a synthetic Al-deficient phlogopite-annite series. Al-deficient natural samples of phlogopite and annite show similar behaviour. The Fe2+ QSDs can be interpreted as population distributions of local distortion environments (LDEs) and, as such, contain much information that will become more accessible as theoretical calculations linking particular LDEs to corresponding QS values are developed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00202140
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