Premium
Structural phase transitions in RbLiSO 4
Author(s) -
Lemos V.,
Camargo F.,
Hernandes A. C.,
Freire P. T. C.
Publication year - 1993
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250240304
Subject(s) - raman spectroscopy , phase transition , hysteresis , spectral line , high pressure , phase (matter) , chemistry , crystallography , materials science , condensed matter physics , thermodynamics , physics , optics , organic chemistry , astronomy
Unpolarized Raman spectra of RbLiSO 4 were obtained for pressures in the range 1 atm–9.5 GPa. Several modifications observed in the spectra were interpreted in terms of two‐phase transitions. The critical pressures for these transitions were determined at 2.5 and 5.5 GPa on increasing the pressure. The first transition is irreversible and can also occur for pressures >2.5 GPa, although through a process varying slowly. The higher pressure transition is reversible but with a marked hysteresis.