The reflection spectra of ZnSnP2 crystals with chalcopyrite and sphalerite structure and CdGeAs2 crystals with chalcopyrite structure have been investigated in the energy range from 1 to 11 eV. The observed reflectance maxima correspond to the interband transitions at the Γ, L, and X points of the Brillouin zone and to transitions from d‐bands.
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