Abstract: Insitu Raman spectra of olivine have been studied at temperatures 273 K to 1 113 K and at ambient pressure using resistancewire heating．Temperature of the sample was measured by an alumelchromel thermocouple．The Raman study reveals that the Si-O stretching modes above 800 cm^-1；the Si-O bending modes between 400 cm^-1 and 700 cm^-1；SiO₄ rotation and metaloxygen translation modes below 400 cm^-1．The authors determined the temperature dependences of the Raman bands of olivine and observed for the first time that the Si-O bending modes corresponding to the ambient 541cm^-1 band have a weaker temperature effect than other bands．

Key words: olivine, insitu, hightemperature, Raman spectroscopy