Fig. 2
From: The effect of Fe incorporation on the single-crystal elasticity of δ-AlOOH
Mössbauer spectrum of Fe6 crystals belonging to the H4802 synthesis run. Spectral components are linked to the quadrupole doublet (Fe3+ − 2, in blue) and a superparamagnetic component (Fe3+ − 1, in green) of ferric iron (Fe3+)