Laser Raman spectra of potassium sulphamate single crystal

Room temperature polarized Raman spectra of potassium sulphamate single crystals have been investigated in the region 30–3400 cm−1 using laser excitation. All lattice modes, excepting two, have been observed. The reassignment of the internal modes of (NH2SO3)− ion has been verified by computing the potential energy distribution. The observed correlation field splitting in KNH2SO3 crystal is very small, of the order of 5–10 cm−1.