Intrinsic optical absorption in Hg1-xMnxTe caused by direct electron transitions between the heavy -hole and conduction bands is satisfactory described in terms of Kana' s model in the optical absorption spectra of Hg1-xMnxTe. In the region of absorption coefficient α<103 cm-1 the deviation from the parabolic dispersion low in the conduction band is not exhibited. This allows the Hg1-xMnxTe ba...