Question: The following table lists diffraction angles for the first four peaks (first-order) of the x-ray diffraction pattern for platinum (Pt), which has an FCC crystal

The following table lists diffraction angles for the first four peaks (first-order) of the x-ray diffraction pattern for platinum (Pt), which has an FCC crystal structure; monochromatic x-radiation having a wavelength of 0.0711 nm was used.

Plane Indices _____________ Diffraction Angle (2()

(111) ..................................... 18.06o

(200) ..................................... 20.88o

(220) ..................................... 26.66o

(311) ..................................... 31.37o

(a) Determine the interplanar spacing for each of the peaks.

(b) For each peak, determine the atomic radius for Pt, and compare these with the value presented in Table 3.1?

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