Development of tin isotope analytical method in iron meteorites and mass independent isotopic fractionation during chemical separation.

Abstract

The isotope effect includes a mass-dependent effect and a non-mass-dependent effect caused by a nuclear volume effect, and in the non-mass-dependent effect, an odd-numbered mass-numbered isotope behaves differently from an even-numbered mass-numbered isotope. Isotopic anomalies (Ca, Ti, Cr, Sr, etc.) found in meteorites cannot be explained during nucleosynthesis, and features similar to the non-mass-dependent nuclear volume effect have been observed (Bigeleisen and Mayer,). 1947; Urey, 1947; Fujii, 1989). Solvent extraction shows similarities between the nuclear volume effect and the results of non-mass-dependent isotope fractionation (MIF) (Fujii et al., 2006), and the solvent is used to elucidate the isotopic anomalies found in meteorites. The extraction method is considered to be a useful experimental method. In this study, we focused on Sn, in which the influence of the nuclear volume effect is greatly observed in the solvent extraction method, and aimed to apply the information obtained there to the analysis results of Sn in iron meteorites.