Science Advances

Supplementary Materials

This PDF file includes:

  • fig. S1. EC as a function of volume fraction of magnetite in chlorites.
  • fig. S2. Electron backscattered images of the nickel (Ni) electrodes after the EC measurements.
  • fig. S3. Impedance spectra of the sample at different stages of heating.
  • table S1. The chemical composition of chlorite and its dehydration products.
  • table S2. The fitting parameters for chlorite, aqueous fluid, and magnetite.
  • References (38, 39)

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