Spectrum Optical constants of Fe-oxide from UV to FIR Spectrum Optical constants of Fe-Mg-oxide, stoichiometric Fe content 0.9, from UV to FIR Spectrum Optical constants of Fe-Mg-oxide, stoichiometric Fe content 0.8, from UV to FIR Spectrum Optical constants of Fe-Mg-oxide, stoichiometric Fe content 0.7, from UV to FIR Spectrum Optical constants of Fe-Mg-oxide, stoichiometric Fe content 0.5, from UV to FIR Spectrum Optical constants of Fe-Mg-oxide, stoichiometric Fe content 0.4, from UV to FIR