OBSERVATION OF COUPLED AMPLITUDE MODES IN THE RAMAN-SPECTRUM OF INCOMMENSURATE GAMMA-NA2CO3
Temperature-dependent phonons have been observed in the Raman spectrum of incommensurate psi -Na2CO3. Two modes are identified as q approximately=0 librational modes of the CO32- groups, which soften at the alpha - beta transition at Tc1=763K. At T c2=633K a modulation of the structure sets in which...
| المؤلفون الرئيسيون: | , |
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| التنسيق: | Journal article |
| اللغة: | English |
| منشور في: |
1981
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