VizieR Online Data Catalog: Magnesium and silicon K-edges cross sections (Rogantini+, 2019)

In our sample set we considered pyroxenes and olivine with varying Mg-to-Fe ratios. Olivine can be pure Mg₂SiO₄ (forsterite), Fe₂SiO₄ (fayalite), or some combination of the two, written as . Pyroxene can be Mg-pure MgSiO₃ (enstatite), Fe-pure FeSiO₃ (ferrosilite), or a combination of the two. The nomenclature En(x)Fs(1-x) indicates the fraction of iron (or magnesium) included in the compound. "En" stands for enstatite and "Fs" for ferrosilite. These silicate compounds are present in both crystalline and amorphous forms. We completed our sample set adding spinel, which is a Mg-bearing compound which crystallises in the cubic crystal system formed by oxygens, whereas Mg and Al atoms sit in tetrahedral and octahedral sites in the lattice (Mutschke et al., 1998A&A...333..188M). Spinel has been observed in chondritic meteorite with pre-solar composition and has been produced by gas outflows of red giant stars (Zinner et al. 2005, Geochim. Cosmochim. Acta, 69, 4149).

(12 data files).