A compound is formed by two element M and N . The element N forms ccp and atoms M occupy `frac{1}{3}` of the tetral voids. What is the formula of the compound?

Explanation

Ans: Atoms of .M. occupy .omega/3^ rd . of tetrahedral
voids. .therefore. Atoms of .N. will occupy .2/3 pi. of octahedral voids as the compound forms ccp structure. Suppose there-are .90 ~N. atoms The total octahedral voids .=90. Hence .M. atoms .2/3 xx 90 doteq 60. Ratio of .M: N=60: 90=2: 3.
therefore Formula of the compound is M_2 ~N_3^*