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Figure 5
Synchrotron Mössbauer data (black dots) and fit spectra (gray) of almost pure Fe3C at ambient conditions and an Fe3C sample containing iron impurity at high pressures (Table 1[link]). The presence of iron is clearly indicated by the persistence of fast beats in the SMS spectra between 9.3 and 18 GPa, where Fe3C is non-magnetic and b.c.c.-iron is magnetic. At 20 GPa, the b.c.c. (α) to h.c.p. () transition and concurrent loss of magnetism in iron is complete, as indicated by the disappearance of fast beats in the SMS spectrum.

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