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Which of the following statements is/are CORRECT? If an ionic compound with the formula MX forms a face-centered cubic unit cell with the anions (Xn-) at the lattice points,the cations (Mn+) may occupy
1) one fourth of the tetrahedral holes in each unit cell.
2) all of the octahedral holes in each unit cell.
3) the center of each face in each unit cell.
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