text: Very similar equations may be applied to the growth and melting of crystals in the confined geometry of porous systems. However the geometry term for the crystal-liquid interface may be different, and there may be additional surface energy terms to consider, which can be written as a wetting angle term . The angle is usually considered to be near 180°. In cylindrical pores there is some evidence that the freezing interface may be spherical, while the melting interface may be cylindrical, based on preliminary measurements for the measured ratio for  in cylindrical pores.
  Thus for a spherical interface between a non-wetting crystal and its own liquid, in an infinite cylindrical pore of diameter , the structural melting point depression
  is given by: