Electrical conductivity of siderite and the effect of the spin transition of iron

HIGHLIGHTS

• What: This study has been conducted at ambient temperature under dry condition, so the small polaron is likely to be the predominant conduction mechanism in siderite in this study. The conductivity becomes higher with increasing pressure when the small polaron hopping conduction mechanism is dominant as is the case with ferropericlase (Lin et_al 2007a; Ohta et_al 2007; 2008; Yoshino et_al 2011), which is the major reason for the difference in electrical conductivity between this study conducted above 25 GPa and the previous study at 1-3 GPa (Hu et_al 2022). In Fig 7, the authors compare the . . .
  

   

  

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