Table of Contents
- 1 Which cubic crystal structure has the greatest packing efficiency?
- 2 Which cubic structure has highest packing factor?
- 3 Which has highest packing efficiency?
- 4 Is hcp and fcc same?
- 5 Which crystal structure has the highest density?
- 6 Which type of crystal packing the packing fraction is highest?
- 7 What does packing efficiency of a crystal structure tell us?
Which cubic crystal structure has the greatest packing efficiency?
Which crystal lattice has most efficient packing efficiency? Solution: The packing efficiency of both types of close packed structure is 74\%, i.e. 74\% of the space in hcp and ccp is filled. The hcp and ccp structure are equally efficient; in terms of packing. The packing efficiency of simple cubic lattice is 52.4\%.
Which cubic structure has highest packing factor?
Hexagonal close-packed and face-centered cubic structures have maximum packing factor and are more able to resist deformation.
Which has highest packing efficiency?
Hexagonal close−packed lattice has the highest packing efficiency of 74\%.
Which of the cubic unit cells results in the most efficient packing?
Packing efficiency of bcc structure = (83πr3)(64/3√3)3×100=(83π)64/3√3×100=68\%. Let us now calculate the packing efficiency of a simple cubic structure. From the figure, it is clear that atoms are located at the corners of the unit cell. We know that in each unit cell of bcc structure, there is one sphere.
Is CCP and HCP same?
-fcc stands for face centered cell and the coordination number is 12. -ccp stands for cubic close packed and the coordination number is 12. -Similarly, hcp stands for hexagonal close packed cell and the coordination number is 12….The Coordination number of bcc, fcc, ccp, hcp is:
| Type of packing | Packing efficiency | No. of atoms per unit cell |
|---|---|---|
| ccp | 74\% | 6 |
| hcp | 74\% | 6 |
Is hcp and fcc same?
The hexagonal closest packed (hcp) has a coordination number of 12 and contains 6 atoms per unit cell. The face-centered cubic (fcc) has a coordination number of 12 and contains 4 atoms per unit cell.
Which crystal structure has the highest density?
face-centered cubic
There are two simple regular lattices that achieve this highest average density. They are called face-centered cubic (FCC) (also called cubic close packed) and hexagonal close-packed (HCP), based on their symmetry.
Which type of crystal packing the packing fraction is highest?
atomic packing factor
In the crystal structure, the atomic packing factor (APF) or packing efficiency or packing fraction is the fraction of volume in a crystal structure that is occupied by constituent particles. It is a dimensionless quantity and always less than unity….Detailed Solution.
| Structure | Atomic packing factor |
|---|---|
| SC | 0.52 |
What is the packing efficiency of a simple cubic crystal?
Therefore, the packing efficiency of the simple cubic lattice is 52.3\% .
Which of the following cubic crystal structure is closely packed?
(C)face centred cubic arrangement. (D)both fcc and bcc. The most closely packed structure is determine by its packing efficiency. This shows that FCC is most closely packed crystal lattice.
What does packing efficiency of a crystal structure tell us?
The packing efficiency of a crystal structure tells us how much of the available space is being occupied by atoms. It is usually represented by a percentage or volume fraction. The steps usually taken are: Calculate the volume of the unit cell.