Mössbauer spectroscopy of minerals

✍ Scribed by D. G. Rancourt; J. Y. Ping; R. G. Berman

• Publisher: Springer-Verlag
• Year: 1994
• Tongue: English
• Weight: 893 KB
• Volume: 21
• Category: Article
• ISSN: 0342-1791
• DOI: 10.1007/bf00202140

✦ Synopsis

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 M6ssbauer spectra of members of a mineral family in terms of QSDs. The Fe 2+ 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 Fe 2+ 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.