Why this differs from similar rows:
Fit uses the full P-V dataset from run M868 up to >90 GPa; sibling row restricts the fit to data below 70 GPa, giving a different KT0/K'.
Why this differs from similar rows:
Fit restricted to the P<70 GPa subset of run M868's data; sibling row uses the full dataset to >90 GPa. Deviation above 70 GPa is noted as possibly linked to an Fe spin transition.