The correct information regarding a solid element (atomic radius = r) having ABCABC.... type packing — Solid State Chemistry Question

💡 Solution & Explanation

In FCC, the distance between nearest octahedral (at body center) and tetrahedral void (at 1/4 of body diagonal) is (sqrt(3)a)/4. The distance between two nearest octahedral voids is a/sqrt(2). The distance between two consecutive close-packed layers (A and B) is a/sqrt(3) = 2r * sqrt(2/3).