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Unformatted text preview: 2. Suppose that some atoms in a Cu crystal, which has an fcc lattice, are gradually replaced by Zn atoms. Considering that Zn is divalent while Cu is monovalent, calculate the atomic ratio of Zn to Cu in a CuZn alloy (brass) at which the Fermi sphere touches the zone faces. Use the free-electron model. This particular alloy is interesting because the solid undergoes a structural phase change at this concentration ratio....
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- Spring '08