Vibrational spectra of barium formate crystal

The Raman spectra of barium formate were investigated at room temperature and liquid nitrogen temperature and the infrared absorption and reflection spectra at room temperature. The presence of two crystallographically non‐equivalent sets of formate ions in the lattice results in the doubling of the internal modes in the vibrational spectra. The observed high‐wavenumber vibrational bands are assigned to the internal vibrations of formate ions.