A new potential synthetic pyrrhotite reference material for Fe–S isotope microanalysis

Synthetic pyrrhotite SY-Po represents a promising new reference material for in situ Fe and S isotope microanalysis, with recommended δ 56 Fe and δ 34 S values of 0.39 ± 0.03‰ (2SD, n = 3) and −1.16 ± 0.23‰ (2SD, n = 11), respectively.