Table 1: Electron binding energies for the olivine constituent atoms. The Si 2p band at 101.9 eV is used as a reference position.
Olivine constituent atoms Binding energy (eV) ($\pm$0.2 eV)
  for the experimental samples
Si 2p 101.9
Mg 1s 1304.0
Mg 2p 50.2
O 1s 531.0-531.2
Fe3+ 2p3/2 711.6
Fe2+ 2p3/2 709.9
Fe0 2p3/2 706.3
C 1s (contamination) 285.0

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