Position of mica

Finally, recent work by Dyar et al. (2001) has created a mica-specific calibration line based on pre-edge positions of micas for which wet chemical or Mossbauer Fe VZFe contents were known (Fig. 12). Based upon this calibration line, Fe VEFe contents of unknown micas can be determined. However, results from this calibration are almost indistinguishable from those of the Bajt et al. (1994) method. Thus, the Bajt et al. (1994) calibration method was used to produce the Fe /EFe results shown in Figure 10. 

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