In CaF_2 crystal, Ca^(2+) ions are present in FCC arrangment . Calculate the number of F^- ions in the unit cell.

In CaF_2 crystal, Ca^(2+) ions are present in FCC arrangment . Calcula

1.	In CaF_2 crystal, Ca^(2+) ions are present in FCC arrangment . Calculate the number of F^- ions in the unit cell.
Answer» Solution :No. of `CA^(2+)` IONS per UNIT cell =`8xx1/8+6xx1/2=4`. HENCE, no. of `F^-` ions per unit cell = 2 x 4 =8