A mineral having the formula crystallizes in the CCP lattice, with the A atoms occupying the lattice — Solid State Chemistry Question

💡 Solution & Explanation

A atoms form the CCP lattice (4 atoms per unit cell). For the formula to be $\text{AB}_2$, there must be 8 B atoms, which perfectly fills all 8 tetrahedral voids. In this structure (fluorite type), the coordination number of the B atoms located in tetrahedral voids is 4. Therefore, correct answer is A.