Welcome to Chem Zipper.com......: If the total number of atoms per unit cell in an hcp structure and a bcc structure gets halved, then ratio of percentage voids in hcp and bcc structures is

## Saturday, June 6, 2020

### If the total number of atoms per unit cell in an hcp structure and a bcc structure gets halved, then ratio of percentage voids in hcp and bcc structures is

In HCP ; Packing efficiency:
Atoms occupy:74%
Empty space(voids): 28%
In BCC; Packing efficiency:
Atoms occupy: 68%
Empty space(voids): 32%
According to the given condition if the total number of atoms per unit cell in a hcp structure and a bcc structure get halved. Then packing efficiency in HCP and BCC respectively given as:

In HCP ; Packing efficiency:
Atoms occupy: 74/2 = 37%
Empty space(voids): (100 - 37) = 63%
In BCC; Packing efficiency:
Atoms occupy: 68/2 = 34%
Empty space(voids): (100 - 34) = 66%

Then new ratio of their voids = 63%/66% = 21/22

## Featured Post

### Salicylic acid is a stronger acid than Benzoic acid. Why?

Salicylic acid is a stronger acid than benzoic acid. It is due to the fact that in salicylate ion (conjugate base of salicylic acid) intram...