The total vapour pressures of t-butyl alcohol (TBA) and water mixtures
have been measured at 283.15, 288.15, 293.15, 298.15 and 303.15 K, re
spectively. Maxima and minima were observed in the vapour pressure ver
sus concentration curves at the three lowest temperatures. The anomalo
us behaviour of the solution can be explained by the existence of a cl
athrate-like structure, which has been suggested by other authors.