Phonon dispersions throughout the iron spin crossover in ferropericlase

Michel L. Marcondes, Fawei Zheng, Renata M. Wentzcovitch

Ferropericlase (Fp), (Mg${}_{1-\mathrm{x}}$Fe${}_{\mathrm{x}}$)O, is the second most abundant phase in the Earths lower mantle. At relevant pressure-temperature conditions, iron in Fp unde…