hexagonal close packing

one of two densest possible sphere packings in 3D Euclidean space

en-GB/hɛksˈæɡənl kləʊs ˈpækɪŋ/
en-US/hɛkˈsæɡənəl ˈkloʊz ˈpækɪŋ/

زمرے:

close-packing of equal sphereslatticecrystal structure