Fig. 6: Representative synchrotron Mössbauer source spectra of Fe0.94O at the indicated pressures and temperatures.
From: Monoclinic distortion and magnetic transitions in FeO under pressure and temperature

a, b, c: rhombohedral (rB1) phase; (d, e, f): monoclinic phases. Solid lines show the model fits, the percentage bars indicate the relative absorptions, and the residuals of the fits are indicated below each spectrum. The spectrum in (f) is fitted by a sextet with a distribution of the magnetic field.