It was noted that the internal stresses which existed around domain walls could cause deformation of the crystal surface. The resultant surface distortions were here calculated for the case of antiphase boundaries in tetragonal crystals. In the case of KSCN, a bump-shaped deformation of the surface occurred, with a height of less than 0.1nm. This effect was much smaller in the bromide but, as well as a bump, a valley could also appear; depending upon the orientation of the antiphase boundary. It was pointed out that antiphase boundaries, which were difficult to observe, could be revealed by these deformations of the crystal surface.

I.Rychetský: Journal of Physics - Condensed Matter, 1997, 9[22], 4583-92