Question

what is cubic close packing (cup)?

Answer 1

Cubic Closest Packed (CCP) The arrangement in a cubic closest packing also efficiently fills up 74% of space. Similar to hexagonal closest packing, the second layer of spheres is placed on to of half of the depressions of the first layer.

Answer 2

Simple cubic close packingconsists of placing spheres centered on integer coordinates in Cartesian space. Arranging layers of close-packed spheres such that the spheres of every third layer overlying one another gives cubic close packing.