ISSN:
1572-9540
Keywords:
Mössbauer fractions
;
crystal field
;
riebeckite
;
franklinite
;
bernalite
;
low-pressure clinopyroxene
;
hedenbergite
;
diamond inclusions
;
deliensite
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract The microscopic models which are commonly used to interpret the temperature variations of the centre shifts and quadrupole splittings observed from the Mössbauer spectra of iron-containing minerals are briefly presented and illustrated using the results of recent studies of ortho- and clinopyroxenes. The importance of applied-field Mössbauer spectroscopy for the determination of the electric field gradient is indicated. Aspects of the magnetic spectra of Fe2+-bearing minerals emphasise the benefit of using external fields to elucidate the nature of the magnetic ordering. Two Fe3+ minerals, bernalite and franklinite, serve as examples to illustrate this point. Finally, two applications of the Mössbauer milliprobe technique are presented: the characterisation of inclusions in diamond, and the determination of the oxidation state of a new iron uranyl sulfate mineral, deliensite.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1012629202835
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