摘要:
Gamma-Cd(OH)2 was reported to be an aquoxy-hydroxide of formulae: Cd2 O(OH)2.H2O (Riou et al., 1990). From IR and Raman spectroscopic studies, it is revealed that gamma-Cd(OH)2 is really a common hydroxide. There are three different OH- ions. One forms relatively strong OH...OH hydrogen bonds (OH stretching mode 3247 cm-1), the other (3588 and 3531 cm-1) are not involved in H-bonds. Both the possibility of coexistence of 02- and H2O and distinction of H2O and OH- in solids are discussed.