Determine the conditions governing geometrical structure factor for an fcc lattice. Is reflection observed from the (111) and (211) planes of the fcc structure?

In a face-centered cubic (fcc) lattice, the geometrical structure factor determines the intensity of diffraction from specific crystallographic planes. The structure factor, F(hkl)F(hkl), is given by:

F(hkl)=∑jfje2πi(hxj+kyj+lzj)F(hkl) = \sum_{j} f_j e^{2\pi i (h x_j + k y_j + l z_j)}

where fjf_j represents the atomic form factor, ____ __________ _____ ______ _______ _______ ________.
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