1. Calculate the limiting radius ratio of an octahedral hole in a fcc lattice. 2. Show that the (100) plane is less densely packed than the (111) plane in a fcc unit cell. Assume all holes are empty. (Hint: calculate the fractional composition of atoms in each plane and divide by the area).

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Crystallography

Crystallography is the category of science that focuses on the atomic and molecular arrangements with their bonding constituting the crystal structure. It is derived experimentally and originated in the year 1912. It is a combination of two words; those are crystal, meaning a cold drop, and graph, meaning writing.