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Vibrational Spectra of Ca 3 SiO 5 : Ultraviolet Laser Raman Spectroscopy at High Temperatures
Author(s) -
Fujimori Hirotaka,
Komatsu Hiroshi,
Ioku Koji,
Goto Seishi,
Watanabe Tomoaki
Publication year - 2005
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2005.00376.x
Subject(s) - raman spectroscopy , triclinic crystal system , monoclinic crystal system , ultraviolet , analytical chemistry (journal) , spectral line , grüneisen parameter , laser , materials science , chemistry , molecular physics , crystal structure , crystallography , optics , thermal expansion , physics , optoelectronics , astronomy , chromatography , metallurgy
The Raman spectra of Ca 3 SiO 5 have been successfully obtained at temperatures up to 1353 K by a continuous‐wave ultraviolet Raman spectroscopic system. The Raman spectra do not change significantly with an increase in temperature, despite triclinic ( T )→monoclinic ( M )→rhombohedral ( R ) transitions. The present result is described in terms of the parameter related to temperature variation at constant pressure, defined in a manner similar to the Gruneisen parameter. Raman bands located above 350 cm −1 show smaller values of the parameter than lower frequency modes, suggesting that these higher frequency modes are assigned to SiO 4 internal modes.