513.001 Molecular and Solid State Physics

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Physical
Constants

Periodic System
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Powder diffraction

a) Explain the difference between powder diffraction and x-ray diffraction on single crystals.

b) A powder of a crystalline material is investigated by x-ray powder diffraction using a wavelength of 0.154 nm. The crystalline material has a tetragonal crystal structure with lattice constants a = 0.45 nm and c = 0.5 nm. At which angles 2θ are diffraction peaks expected?