Kink site positions of alloys

5 SURFACE SELECTIVITY IN ALLOY DEPOSITION 8.5.1 Kink site positions of alloys 

The two kink site positions can react with the two types of metal ions in the electrolyte to form four new kink site positions. Kink site position A reacts with ion A + and forms the new kink site position AA. Kink site position A reacts with ion and forms the new kink site position AB. Kink site position B reacts with ion A and forms the new kink site position BA. Kink site position B reacts with ion B and forms the new kink 

The nature of the atom in the kink site position determines the reactivity of the kink site position in the next step, when a new atom is added to the kink site thus incorporating the atom in the kink site position into the lattice and forming a new type of kink site position, or the atom last included is separated from the kink site position (transition to the previous type). These reactions either lead to a reproduction of the existing kink site position, AB or BA or to new kink site positions, AA and BB. It depends on the stability of the new kink site positions whether the strong stoichiometry continues or whether new structures will be developed, either a eutectic mixture or a solid solution. 

The concept of kink site positions can be extended to alloys of variable stoichiometry and of irregular composition (solid solutions). Atoms of different chemical nature A or B surround each atom in a kink site position. Restricting the discussion to first neighbors in the case of a cubic close packed or hexagonal close packed lattice, the following different situations are possible  

A similar variety of kink site position is expected for a body centered cubic lattice where the second nearest neighbors must be included into the discussion. 

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