In 3D hexagonal close packing, the distance between two nearest parallel layers is : [Height of the hexagon=h]
Answers
Answer:
mark me as brainliest
Explanation:
In hexagonal close packing, layers of spheres are packed so that spheres in alternating layers overlie one another. As in cubic close packing, each sphere is surrounded by 12 other spheres. Taking a collection of 13 such spheres gives the cluster illustrated above. Connecting the centers of the external 12 spheres gives Johnson solid J_(27) known as the triangular orthobicupola (Steinhaus 1999, pp. 203-205; Wells 1991, p. 237).
Hexagonal close packing must give the same packing density as cubic close packing, since sliding one sheet of spheres cannot affect the volume they occupy. To verify this, construct a three-dimensional diagram containing a hexagonal unit cell with three layers (Steinhaus 1999, pp. 203-204). Both the top and the bottom contain six 1/6-spheres and one hemisphere. The total number of spheres in these two rows is therefore