5.22. Two single crystals, one of gold and one of nickel, are prepared with polished (100) faces and joined together. The lattice constants of gold and nickel are 4.0 and 3.6A, respectively, and both metals have the f.c.c. (Fm3m) space group. Assume that the lattice constant mismatch is made up by forming a semicoherent interface between the two crystals. What specific dislocations do you expect to find in the interface and what will be their spacing