Kinetics of a rough crystal face: Temperature dependence of the growth rate

We present measurements of the linear growth rate of the (110)-face of naphthalene growing from toluene solution at various equilibrium temperatures. Above a critical supersaturation the growth rate depends linear on the supersaturation and the (110)-face becomes round, which both indicates kinetic roughening. Within a temperature interval of 50° C the growth rate changes by nearly two orders of magnitude. The slope of the linear part of the growth curve can be described by an activated process, the activation energy turns out to be of the order of the evaporation enthalpy of naphthalene.