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Table 2 Relative abundances of lepidocrocite and magnetite/maghemite appearing in 57Fe Mössbauer spectra at 77 K

From: Fe(II) reduction of pyrolusite (β-MnO2) and secondary mineral evolution

Fe(II) addition Appearance of 57Fe(II) in Seriesa
# 1 100/0 NAb NA NA NA
# 2 85/15 57/43 NA NA NA
# 3 75/25 46/54 52/48 NA NA
# 6 c 9/91 NA
# 9 3/97
  1. aRefers to the position of single 57Fe(II) resuspension in the resuspension sequence. All other Fe(II) resuspensions were performed using 56Fe(II), which would not contribute to observed Mössbauer spectra
  2. bNA due to addition of 56Fe(II) in this position. No Mössbauer spectral features were observed, as 56Fe(II) is not visible to 57Fe Mössbauer spectroscopy
  3. cDashed lines indicate that the experiment was not performed