Vibrational Study of Manganese Ammonium Dihydrogendiphosphate Hydrated Mn0.5NH4H2P2O7 H2O

Raman and infrared spectra of manganese ammonium dihydrogendiphosphate hydrated Mn0.5NH4H2P2O7·H2O have been collected and interpreted using factor group analysis. Non-coincidence of the Raman and infrared spectra bands confirms a centrosymmetric structure for Mn0.5NH4H2P2O7·H2O, as previously investigated by X-ray structural study, as well as the joint appearance of ?as POP and ?s POP point to a bent POP configuration.