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A compounalloogold and copper crystallizes in a cube latticiwhich thgolatomoccupy the cornerof a cube and the copper atoms occupy thcentreoeacothcubfaces. The formulothis compounis-

  1. AuCu    
  2. AuCu2    
  3. AuCu3    
  4. None    

The correct answer is: AuCu3


    One-eighthofeachcorneratom(Au)andone- half of each face-centered atom (Cu) are contained withintheunit cellofthecompound. Thus, the number ofAu atoms per unit cell

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