Classification of Meteorites - Mössbauer Comparative Studies of Three Ordinary Chondrites Measured in Different Laboratories

P. Bogusza, K. Brzózkab, B. Górkab, T. Szumiatab, M. Woźniakc, J. Gałązka-Friedmana aWarsaw University of Technology, Faculty of Physics, Koszykowa 75, 00-662 Warsaw, Poland bUniversity of Technology and Humanities, Faculty of Mechanical Engineering, Department of Physics, E. Stasieckiego 54, 26-600 Radom, Poland cWarsaw University, Faculty of Biology, Miecznikowa 1, 02-096 Warsaw, Poland

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Three meteorites - Bassikounou, Buzzard Coulee, and Zag - were studied with the use of the Mössbauer spectroscopy to assess how different experimental conditions, e.g. different statistics, velocity resolution and different ways of fitting the Mössbauer spectra could cause discrepancies regarding the percentages of spectral areas of main mineral phases (olivine, pyroxene, metallic phase and troilite) present in ordinary chondrites. The answer to this question is crucial for creation of a common database for a new method of classification of ordinary chondrites based on Mössbauer spectroscopy. Our results show that none of the above factors could significantly affect the percentage of spectral areas in the samples measured and the differences obtained with the use of those various methods of assessment were on the level of one percentage point. The final conclusion from this comparative study is that the results from different laboratories could be included to the same database.

DOI:10.12693/APhysPolA.134.1070 PACS numbers: 96.30Za, 91.65.Sn, 75.50.Bb, 76.80.+y, 33.45.+x