Group 3: 💎 Crystal Structures 💎

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Types of Unit cell and key numbers:

BCC Unit Cell

• Coordination no. = 8

• 2 atoms per BCC

• Lattice constant a = 4R√3

HCP Unit Cell

• Coordination no. = 8

• 6 atoms per HCP

FCC Unit Cell

• Coordination no. = 12

• Lattice constant = 2a²= 16R^2. a = 2√2R

• 4 atoms per FCC