Changes of refractive indices for the ternary mixture acetone plus methanol plus n-hexane at 288.15 and 298.15

The refractive indices of the ternary mixture acetone + methanol + n-hexane have been measured at 288.15 and 298.15 K and atmosphere in the whole comp osition diagram. Parameters of polynomial equations which represent the com position dependence of physical and derived property are gathered. The use of a multicomponent extension of Heller equation in order to predict excess molar volumes from refractive indices on mixing are tested against literat ure data, a comparative accuracy with currently available models being obta ined.