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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > If the unit cel.l of a mineral has cubioc closed packed (ccp) array of oxygen atoms with m fraction of octahedral holes occupied by aluminium ions and n fraction of tetrahedral holes occupied by magnesium ions, m and n , respectively , are

If the unit cel.l of a mineral has cubioc closed packed (ccp) array of oxygen atoms with m fraction of octahedral holes occupied by aluminium ions and n fraction of tetrahedral holes occupied by magnesium ions, m and n , respectively , are

The packing efficiency of the two dimensional square unit cell shown below is (a) 39.27% (b) 68.02% (c) 74.05% (d) 78.54%