Étude expérimentale de propriétés piezo-optiques du CS2 en phase liquide à 273,15 et 298,15 K pour des pressions jusqu'à 140 MPa

Using a Michelson interferometer coupled to a stabilised He–Ne laser, we measured the change of the refractive index of liquid CS2 along two isotherms, 273.15 and 298.15 K for pressures up to 140 MPa. Results show that the classical Lorentz–Lorenz equation versus the pressure varies linearly, as predicted by classical theory. Results also show that for liquid CS2 the experimental value of (8.4 ± 0.5) × 10−24 cm3, for the electronic polarizability in the range studied, is constant with pressure and temperature. Our experimental value of 8.74 × 10−24 cm3 for the electronic polarizability agrees with that found in the literature.