The intensity as a function of temperature of the low-angle x-ray diffraction maxima of the n-paraffins: Hexatriacontane, tetratetracontane, and tetranonacontane

) that occur at these angles result from a lamellar repeat distance which depends on the molecular length. In general the intensity of these maxima was found to increase with increasing temperature in an approximately reversible manner. All the samples experienced solid-solid phase transitions in the temperature range of observation. Several possible mechanisms consistent with the temperature dependence of the intensity are considered.