Host: Japan Association of Mineralogical Sciences
The polarized infrared spectra of H-bearing monazite (LaPO4) was observed to obtain information on OH defects in the crystal lattice of monazite. Two OH absorption bands were observed at 3164 cm-1 and 3330 cm-1. Based on the results from polarized FT-IR observations, these bands showed an anisotropic absorption parallel to [110].