Determine the expected diffraction angle for the first-order diffraction from the (111) set of planes for FCC nickel (Ni) when monochromatic radiation of wavelength 0.1937 nm is used. The lattice parameter for Ni is 0.3524 nm

56°

Explanation:

First calculate

The interplanar spacing can be calculated from:

The diffraction angle is determined from:

Solve for

The diffraction angle is:

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