Hence Z = 4 M = 63.5 a = 3.61x10-8
No = 6.023 x 10 23
Using the formula
Therefore, approximately the value is equal to 8.92.
Close Packing in One Dimension
o
The only way to arrange spheres in a one dimensional close packed structure is to arrange the spheres in a single row and touching each other.
o Each sphere is in contact with two of its surrounding atom.
o
The number of nearest surrounding particles is called its coordination number. Therefore in one dimensional close packed arrangement, the coordination number is 2.
Close Packing in Two Dimensions
Two dimensional close packed structure can be generated by stacking( placing) the rows of close packed spheres.