Growth of Ice Ih in Water and Measurements of its Melting Curve

Visual observations of ice Ih growing in pure water and measurements of the melting curve on which the ice does not grows nor melts are performed using the pressure jump method. The resulting solidliquid equilibrium points exhibit a discontinuity at -16°C and 165 MPa, where the growth shapes also change to a hexagonal plate from a circular disc as a result of roughening transition of the (1010) interfaces. The agreement between discontinuity and roughening points is discussed.