In nacl crysral cl ions are in fcc arrangement .calculaye the number of cl ions in its unit cell
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FCC arrangement has 8 atoms at 8 corners of the cube and 6 atoms at 6 faces of the cube.
Atom at corner has 1/8th contribution to the cell, while atom at face centre has 1/2 contribution.
Effective no. of Cl atoms in FCC=8×(1/8) + 6×(1/2)
= 1 + 3
= 4
Atom at corner has 1/8th contribution to the cell, while atom at face centre has 1/2 contribution.
Effective no. of Cl atoms in FCC=8×(1/8) + 6×(1/2)
= 1 + 3
= 4
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