Mechanisms of exchange of isomorphous components between crystal and solution and macrodefectiveness in secondary crystals

Phenomena and mechanisms of mixed crystal formation in solutions II. Mechanism of interface processes

“…Earlier, similar phenomena were observed for a number of aqueous salt systems [3][4][5][6][7][8][9][10][11][12] and during liquid-phase epitaxy of A III B V semiconductors [13][14][15]. Numerous observations of such processes in aqueous solutions demonstrated the correlation between the forming surface morphology and the solubility ratio of the system components.…”

“…The first two stages are common for all cases of the contact between mutually nonequilibrium crystal and liquid observed in Refs. [1,[3][4][5][6][7][8][9][10][11][12][13][14][15]. The third stage is the key one in the formation of any characteristic morphological texture, because it is this stage that is accompanied by the formation of channels (pores) in the substrate or intergrowth of islands and formation of a continuous epitaxial layer.…”

“…The phenomena observed in Refs. [1,[3][4][5][6][7][8][9][10][11][12][13][14][15] are interpreted based on the fact that the crystal dissolution and the additional amount of the substance in the solution in a thin diffuse layer in the vicinity of the surface give rise to supersaturation and crystallization of a new phase.…”

“…Numerous observations of such processes in aqueous solutions demonstrated the correlation between the forming surface morphology and the solubility ratio of the system components. The physicochemical analysis with the use of the concentration phase diagrams allowed Glikin et al [1,[3][4][5][6][7][8][9][10][11][12] to suggest the following model. If the solubility of the phase to be crystallized is lower than the solubility of the initial crystal (volume deficit replacement) the formation of individual islands alternating with pits and deep channels is observed.…”

“…We also analyzed the problem theoretically with due regard for the results obtained in Refs. [1,[3][4][5][6][7][8][9][10][11][12][13][14][15].…”