Abstract
Room temperature 57Fe Mossbauer effect spectroscopy has been used to investigate the local Fe environment in a set of indochinite tektites from Thailand. A MIMOS II spectrometer in backscattering geometry has been used in the study, so that no sample preparation at all was required. The spectra have been analysed in terms of discrete spectral components using Voigt functions. The results are similar to those obtained with analysis done with quadrupole splitting distributions. In all cases the Mossbauer spectra show a broadened asymmetric quadrupole split doublet. The Fe2+ sites have been distinguished in Fe with octahedral and tetrahedral coordination. The Fe3+/Fe2+ and Fe2+ tetrahedral/octahedral ratios have been determined from the relative areas of the various spectral components. Their values have been discussed in the light of actual literature.
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