Raman, infrared and energy dispersive X-ray spectra of monazites have been measured and discussed. The result shows that the mineral is enriched in cerium, lanthanum,neodymium and praseodymium (Ce>La>Nd>Pr). The monazites have marked spectral characteristics, especially their ν_1, ν_3 Raman bands and ν_1, ν_4 infrared absorption bands. The characteristics can distinguish between monazite and other phosphate minerals. In addition, based on EDS and infrared absorption spectra, a small amount of fluoro-carbonate is found in the monazites. Raman, infrared and energy dispersive X-ray spectra of monazites have been measured and discussed. The results shows that the mineral is enriched in cerium, lanthanum, neodymium and praseodymium (Ce> La> Nd> Pr) , especially their ν_1, ν_3 Raman bands and ν_1, ν_4 infrared absorption bands. In addition, based on EDS and infrared absorption spectra, a small amount of fluoro-carbonate is found in the monazites .