3d packing

2D and 3D closed packing

the coordination no. in 3D close packing of spheres having packing of the type (ABC) (ABC) is Y. calculate the value of Y/2

The co-ordination number in 3D-hexagonal close packing is

The difference in coordination numbers of hexagonal close packing in 3D and square close packing in 2-D, of identical spheres is:

Close packing in Crystal||1-D Close Packing

2-d Packing||Packing fraction||Simple cubic||bcc

Which one of the following statements is incorrect for HCP packing arrangement in 3D? a) The coordination no.is 12 .b)It has 74% packing efficiency. c) All the octahedral void are fully present inside the unit cell. D) All the tetrahedral void are fully present inside the unit cell.

The packing efficiency of the 2D square unit cell shown below is