The coordination number of Al in the crystalline state of AlCl_3 is
Answer»
Solution :At low temperature , `AlCl_3` EXISTS as a close packed lattice of `Cl^-` ions with `AL^(3+)` ions occupying octahedral voids. Thus, `Al^(3+)` ions `Cl^-` ions AROUND it . Hence, its coordination number is 6.