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Question

Which of the following unit cells has constituent particles occupying the corner positions only?

A
Body-centered cell
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B
Face centered cell
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C
End-centered cell
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D
Primitive cell
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Solution

The correct option is D Primitive cell
According to classification of unit cells, a primitive unit cell is one which has all constituent particles located at its corners. BCC has one particle present at the center including the corners. FCC has an individual cell shared between the faces of adjacent cells. End centered cells have cells present at centers of two opposite faces.

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