Exercises 3.5: Order-disorder

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A. . . . . . . . B. .

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3.5.1 The two upper graphs are plots of the electron density for partially disordered diatomic crystals. The lower two are corresponding diffraction patterns.

A) Which diffraction pattern goes with which density plot?

B) What is the atomic separation relative to the lattice constant?

C) Which pair of density/diffraction plots corresponds to the more ordered structure? How do you argue that independently from each of the two plots?