The Raman spectrum of crystalline quartz has been studied at temperatures between -196 and 615°C. A weak mode of symmetry with room-temperature Raman shift of 147 is found to grow in intensity and move towards zero Raman shift as the alpha-beta transition is approached. This mode, rather than the 207- mode, appears to play the fundamental role in the phase transition. The temperature dependence of the Raman shift of the new mode is given by with .
- Received 19 June 1967
- Published in the issue dated 14 August 1967
© 1967 The American Physical Society