Can someone please explain what is the meaning of this question? How can 1 fcc unit cell be shared by many cells? A corner or a face of a unit cell can be shared by many unit cells. A whole cell cannot be shared, isn't it?
Why can't option d be the answer? Please explain.
@anag there are 6 faces of a unit cell
Imagine a cube as a unit cell. Now the cube has 6 faces on which another cube can be placed/joined
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It is clear from the figure. As a unit cell is consist of 6 faces So it equally shared by 6 unit cell.