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

💡 Solution & Explanation

A primitive hexagonal (HCP) unit cell contains Z = 6 atoms. Mass of 6 Mg atoms = 6 * 24 / (6 * 10^23) = 2.4 * 10^-22 g. Volume of unit cell = Mass / Density = (2.4 * 10^-22) / 1.92 = 1.25 * 10^-22 cm3.