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A unit cell is the smallest repeating portion of a crystal lattice. Unit cells occur in many different varieties. As one example, the cubic crystal system is composed of three different types of unit cells : (1) simple cubic , (2) face- centered cubic , and (3) body- centered cubic .

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A unit cell is the smallest repeating portion of a crystal lattice. Unit cells occur in many different varieties. As one example, the cubic crystal system is composed of three different types of unit cells : (1) simple cubic , (2) face-centered cubic , and (3)body-centered cubic .

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