Infrared Absorption Study of Bonding and Lattice Vibrations in the Cu₂NiTe₂ Chalcogenide Semiconductor

Cu₂NiTe₂ was synthesized, and its crystal lattice and vibrational behavior were investigated in this study. As a consequence, the structural analysis demonstrated a hexagonal arrangement assigned to the space group P6₃/mmc, consistent with hexagonal symmetry. Atomic motions were examined using infrared spectroscopy and interpreted spectroscopically. Six dominant absorption maxima appeared distinctly within the 400-4000 cm⁻¹ region. These features are primarily linked to the vibrations of metal chalcogen bonds, as described chemically.