Which one of the following schemes of ordering close packed sheets of equal-sized spheres do not gen — Solid State Chemistry Question

💡 Solution & Explanation

To maintain close packing, adjacent layers must fit into the depressions of the layer below. A layer cannot be immediately followed by an identically positioned layer (like BB or AA) without disrupting the close-packing arrangement. Thus, the ABBAA.... scheme does not generate a close-packed lattice. Therefore, correct answer is D.