An empirical formula of a solid is . If the A atoms form an FCC lattice, how must the B atoms be dis — Solid State Chemistry Question

💡 Solution & Explanation

If A atoms form an FCC lattice, there are effectively $4$ A atoms per unit cell. To get $AB_2$, there must be $8$ B atoms per unit cell. An FCC unit cell has $8$ tetrahedral voids, so B must occupy all tetrahedral voids.