Infrared Properties of NiO and CoO and Their Mixed Crystals

Abstract

The room‐temperature reststrahlen spectra of flame fusion grown NiO and CoO, as well as those of three intermediate members of this solid solution series, are presented. A full Kramers‐Kronig analysis on all members has been performed and checked with damped oscillator calculations. The resulting refractive indices,extinction coefficients,dielectric constants, effective ionic charges (Szigeti q*), and characteristic frequencies are presented along with the lattice constants and are discussed in the light of their interrelation.