Why cubic unit cell cannot possess end-centred closed packing?? and what is the highest possible symmetry of this type?
 

Asked by vaish.agrawal | 26th Apr, 2015, 09:17: AM

Expert Answer:

In order to have end centered closed packing structure unit cell must possess vectors a≠b≠c, which is absent in case of cubic unit cell due to this cubic unit cell cannot possess end-centred closed packing. The highest symmetry possible for an end centered unit cell is tetragonal.

Answered by Arvind Diwale | 29th Apr, 2015, 10:51: AM