Question: The metal rubidium has a BCC crystal structure. If the angle of diffraction for the (321) set of planes occurs at 27.00( (first-order reflection) when

The metal rubidium has a BCC crystal structure. If the angle of diffraction for the (321) set of planes occurs at 27.00( (first-order reflection) when monochromatic x-radiation having a wavelength of 0.0711 nm is used, compute

(a) The interplanar spacing for this set of planes, and

(b) The atomic radius for the rubidium atom.

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