In NaCl crystal, Ci^(-1) ions are I FCc arrangement, Calculate the number ofCl^(-)ions in its unit cell.

In NaCl crystal, Ci^(-1) ions are I FCc arrangement, Calculate the num

1.	In NaCl crystal, Ci^(-1) ions are I FCc arrangement, Calculate the number ofCl^(-)ions in its unit cell.
Answer» Solution :`CL^(-)` ION per unit CELL = ` 8 xx 1/8 "( from corners)" + 6 xx 1/2`( form face CENTRES ) = 4.