Several other iron sulfide minerals have also been identified in iron sulfide magnetosomes—including mackinawite (tetragonal FeS) and a cubic FeS—which are thought to be precursors of Fe3S4.
Foron identificados tamén outros varios minerais de sulfuros de ferro nos magnetosomas de sulfuro de ferro — incluíndo mackinawita (FeS tetragonal) e un FeS cúbico — que se pensa que son os precursores do Fe3S4.