2:15 PM - 2:30 PM
[R1-02] Compositional dependence of EFG tensor of Fe2+ in M1site of Ca-rich pyroxene
Keywords:Mössbauer spectroscopy, electric field gradient tensor, Ca-rich pyroxene
Fe2+ ions which occupy M1 and M2 sites of pyroxene give similar and overlapping quadrupole doublet in Mössbauer spectra. Electric field gradient tensor (EFG) is important for reliable peak analyses of Mössbauer spectra include M1 and M2 doublets. Mössbauer spectra of crystallograhically oriented thin section of Ca-rich pyroxene (diopside, augite and hedenbergite) were measured to reveal compositional dependence of EFG tensor of Fe2+ in M1site of Ca-rich pyroxene.