Vibrational spectra of double oxalates of the type MI2Cu(C2O4)2·2H2O (MI = Na+, K+, NH4+)

Abstract The infrared and Raman spectra of Na 2 Cu(C 2 O 4 ) 2 ·2H 2 O, K 2 Cu(C 2 O 4 ) 2 ·2H 2 O and (NH 4 ) 2 Cu(C 2 O 4 ) 2 ·2H 2 O were recorded and briefly discussed on the basis of their structural peculiarities and by comparison with the vibrational spectra of other metallic oxalates.