ON THE FORMATION OF DISLOCATION HOLLOW CORES ON CLEAVED (100) FACES OF L-ARGININE PHOSPHATE MONOHYDRATE SINGLE-CRYSTALS

Thermodynamic conditions and energy considerations for the formation o f hollow cores at the emergence points of monolayer cleavage steps ass ociated with screw dislocations on the cleaved {100} faces of LAP sing le crystals are discussed. Analysis of the formation of hollow cores a nd the change of the curvature of steps in tile vicinity of their orig ins reveals that dislocations responsible for the origin of hollow cor es have stress fields due to trapped mother liquor of different supers aturations. The results also show that (1) the radius of a hollow core is inversely proportional to the one-third power of the interface sup ersaturation while the volume of hollow cores increases exponentially with their radius, and that (2) the strain energy associated with. a d islocation is responsible for the formation of an equilibrium hollow c ore of a particular depth at the origins of cleavage steps associated with dislocations.