3D Hexagonal Closed Packing Layered Perfection

The video tutorial explains the concept of three-dimensional closed packing using layers of spheres. It begins with the formation of the first layer, known as layer A, and introduces the concept of voids. The second layer, layer B, is placed over the first, creating tetrahedral and octahedral voids. The third layer, also called layer A, aligns with the first, forming an ABAB pattern known as hexagonal closed packing (HCP) with a coordination number of 12. The video also covers the ABCABC arrangement, leading to cubic closed packing or face-centered cubic structure.

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