TABLE 1

Elemental compositions of the iron coupons

Composition categoryaElements identified
Before treatmentAfter treatment
Abiotic controlStrain TCE1Strain LBE
Main elements (>10%)Fe, OFe, O, CFe, O, CFe, O, C
Secondary elements (between 10 and 1%)Si, C, Al, CaSi, AlP, S, Mg, CaP, S, Si, Ca, Al
Trace elements (<1%)K, Mg, PCa, Na, K, Mg, S, P, ClSi, AlMg, K
  • a The percentages reported correspond to the atomic percentages.