P. Kolandaivel et S. Selvasekarapandian, FT-IR AND RAMAN-SPECTRA OF AMMONIUM HYDROGEN TARTRATE AND POTASSIUM HYDROGEN TARTRATE CRYSTALS, Crystal research and technology, 28(5), 1993, pp. 665-670
FT-IR and Raman spectra of ammonium hydrogen tartrate [NH4HCH4O6] and
potassium hydrogen tartrate [KHC4H4O6] have been measured. Vibrational
assignments have been made for both the internal and external vibrati
ons. Because of the free rotation of the NH4+ ion, it forms only weak
hydrogen bonds with the oxygen atom.