Hyperfine Interactions
Volume 166, Numbers 1-4, 657-664, DOI: 10.1007/s10751-006-9337-y

Mössbauer studies of Jarosite, Mikasaite and Yavapaiite, and implication to their Martian counterparts

Kiyoshi Nomura, Masuo Takeda, Takeshi Iiyama and Hitoshi Sakai

From the issue entitled "Proceedings of the 28th International Conference on the Applications of the Mössbauer Effect (ICAME 2005) held in Montpellier, France, 4-9 September 2005 Part II / V"

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Abstract

In order to confirm Mössbauer spectra of Jarosite, unidentified Fe3+ species (Fe3D3) and Fe2O3 found on Martian surface, some Jarosite specimens produced on Earth were characterized by 57Fe Mössbauer spectroscopy. For comparison, anhydrous ferric sulfate minerals, Mikasaite (Fe3+ 1.56Al0.44)(SO4)3, and Yavapaiite, KFe (SO4)2 were also measured. The thermal decomposition products of Jarosite and their hydration products were also traced by scattering Mössbauer spectra (CEMS and XMS). These data are useful for the identification of hydrous and anhydrous ferric sulfate phases on Mars, including Fe3D3.

Key words  Mössbauer spectra - CEMS - XMS - Jarosite - thermal decomposition - hydration - Mars

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