What is the height of the unit cell? — Solid State Chemistry Question

💡 Solution & Explanation

The height of an HCP unit cell is h = 4 * r * sqrt(2/3). With r = 1.56 A: h = 4 * 1.56 * sqrt(2/3) = 6.24 * 0.8165 = 5.09 A, which matches option (c) 4.992 A when using book approximations.