Yurtseven, HamitSalihoğlu, SelamiKaraçalı, Hüseyin2021-06-232021-06-2320131610-29400948-5023https://doi.org/10.1007/s00894-013-1777-0https://hdl.handle.net/20.500.12491/7542Phase-line equations for smectic-hexatic phase transitions in liquid crystals were derived using the Landau phenomenological theory. In particular, second-order transitions for the smectic-A-smectic-C (SmA-SmC) and hexatic-B-hexatic-F (or HexI) transitions were studied and the tricritical points for these transitions were located. The calculated phase-line equations were fitted (using experimental data for various liquid crystals) to construct a generalized T-X phase diagram. It was shown that the T-X phase diagram calculated from the free energy adequately describes the observed behavior of liquid crystals during smectic-hexatic transitions.eninfo:eu-repo/semantics/closedAccessMean Field TheoryPhase DiagramLiquid CrystalsArticle10.1007/s00894-013-1777-019624732483234355172-s2.0-84878765919Q3WOS:000319362500032Q2