Sensitivity of mass-independent Sn isotope fractionation to UV radiation and magnetic fields.

ABSTRACT: Mass-independent isotope fractionation (MIF) enables powerful geochemical tracers for various geological and planetary problems, yet the mechanisms driving MIF for tin (Sn) remain ambiguous. Here, we demonstrate that distinct Sn isotope fractionation signatures were produced during photolysis of organic Sn species (i.e., methyltin) under laboratory UV irradiation and natural sunlight. UV irradiation of methyltin induced pronounced Sn-MIF in all odd Sn isotopes (Δ¹¹⁵Sn up to 21.82‰, Δ¹¹⁷Sn up to 23.16‰, Δ¹¹⁹Sn up to 24.01‰), with their ratios (Δ¹¹⁷Sn/Δ¹¹⁵Sn = 1.069; Δ¹¹⁹Sn/Δ¹¹⁵Sn = 1.099; Δ¹¹⁹Sn/Δ¹¹⁷Sn = 1.028) strongly correlating with nuclear magnetic moments. This unambiguously identifies t

SUBMITTER: She JX 

PROVIDER: S-EPMC12184507 | biostudies-literature | 2025 Jun

REPOSITORIES: biostudies-literature