In a multilayered close - packed stracture

In a multi layered close-packed structure

In a multi layered close-packed structure

In a multi layered close-packed structures.

In a closed packed structure

Coordination number in a square close packed structure and hexagonal close packed structure respectively are

Why a hexagonal close-packed structure and a cubic close-packed structure for a given element would be expected to have the same density?

How do you distinguish between hexagonal close - packing and cubic close - packing structures ?

Why a hexagonal close-packed structure and a cubic close-packed structure for a given element would be expected to have the same density?

Why a hexagonal close-packed structure and a cubic close-packed structure for a given element would be expected to have the same density?