See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

Since, the crystal should be electrically neutral. So, empirical formula of the solid should be:       3 2 2 1 1 2 4 4 8 4 2 8 Al Zn S ZnAl S       Since, 2 Zn  ions are present in tetrahedral void, so, its coordination number = 4. Also, 3 Al  ions are present in octahedral void, so, its coordination number = 6.