Yurtseven, H.Kurt, M.2025-01-272025-01-2720110217-9792https://doi.org/10.1142/S0217979211059553https://hdl.handle.net/20.500.12428/24345The pressure dependence of the frequency shifts 1/omega(partial derivative omega/partial derivative T)(P) is calculated from the 1/omega(partial derivative omega/partial derivative P)(T) for the Raman modes I and IV according to the spectroscopic modifications of the Pippard relations. The observed Raman frequencies of those modes are used for this calculation close to the I-II phase transition in s-triazine. From the frequency shifts, the isothermal compressibility kappa(T) and the specific heat C-P are also calculated as a function of pressure close to the I-II phase transition in s-triazine. Our calculated values of 1/omega(partial derivative omega/partial derivative T)(P) kappa(T) and C-P can be compared with the experimental measurements at various pressures in the phases I and II of s-triazine.eninfo:eu-repo/semantics/closedAccessPippard relationsRaman modesphase transitions-triazineArticle25324641465310.1142/S0217979211059553Q4WOS:0003022683000302-s2.0-84855574095Q2