Question

How many atoms are in the following unit cells? Body centered cubic, face centered cubic (FCC), a hypothetical body centered/face centered cubic crystal, and a hypothetical diamond cubic structure with superimposed face centered cubic and body centered cubic atoms. Calculate the ratio of the packing factors for the following cases: simple cubic to face centered cubic. simple cubic to hypothetical face centered body centered cubic crystal (i.e. a face centered cubic with a similar atom placed in the center simple cubic to a simple hexagonal unit cell a simple cubic crystal that has a central impurity atom that fills the interstitial space to a simple cubic crystal that has a central simple cubic structure in the interstitial space.

Answer 1

etam to the unit cul Noof toms prenent in this unit atom dwo o pponf No of atoms pmeent per unit ce Diamand ubic uni No.of atoms can hibubedh.Cnn4 Ys= 821