>>13215128usually atoms “settle” into lattice sites as they cool down from a higher temperature/energy phase. an analogy is maybe this: spheres on a surface arrange into a face-centered hexagonal lattice by gravity. like billiard balls on a pool table are most closely packed in the rack and in the rack they form hexagons. but at a higher energy phase you could make them all jump and fly around. but if you let them settle and rack them up they go back to hexagons
