The Fe2+ occupancies in the silicates M1 and M2 sites in Chelyabinsk LL5 meteorite determined using XRD and Mössbauer spectroscopy

详细

Study of four Chelyabinsk LL5 ordinary chondrite fragments with different lithology was carried out using X-ray diffraction and Mössbauer spectroscopy with a high velocity resolution. The Fe²⁺ occupancies of the M1 and M2 sites in olivine, orthopyroxene, and clinopyroxene determined using X-ray diffraction and Mössbauer spectroscopy were compared. Distribution coefficients K_D and the temperatures of cations equilibrium distribution T_eq in the olivine and orthopyroxene were evaluated.