SEARCH Articles Figures Tables Closest packing Closest-packed crystal structures Closest-packed crystal structures cubic Closest-packed crystal structures hexagonal Crystal structure closest packing Cubic closest packed structure Hexagonal closest packed hep) structure Hexagonal closest packed structure Hexagonal-closest packing crystal structure Metal closest-packed crystal structures Packed structures Packings structure Structural packing Structure Types with Occupied Octahedral Interstices in Closest-packings of Spheres