What is the number of nearest neighbours for a given lattice point in CCP lattice?
Answer & explanation
Correct answer: option 2
The correct answer is option 2. 12.
Cubical closed packing structure (CCP)
Fourth layer will overlap with 1st layer, and it is also labelled as ABC-ABC.... type packing.
This type of close packing is highly efficient and 74% space in the crystal is filled. Each sphere is in contact with twelve spheres. Thus, the coordination number is 12 of this structure.