Three lines are drawn from a single corner of a FCC unit cell to meet the other corner such that they are found to pass through exactly only 1 octahedral void, no voids of any type and exactly 2 tetrahedral voids with 1 octahedral void. Identify the line in the same order.

Q. Three lines are drawn from a single FCC unit cell to meet the other corner such that they are found to pass through exactly 1 Octahedral wad only, no voids of any type and 2 tetrahedral voids with exactly 1 Octahedral void only. Identify the line in the same order.

Q. There are three cubic unit cells $A,B$ and $C$. $A$ is $FCC$ and all of its tetrahedral voids are also occupied. $B$ is also $FCC$ and all of its octahedral voids are also occupied. $C$ is simple cubic and all of its cubic voids are also occupied. If voids in all unit cells are occupied by the spheres exactly at their limiting radius, the order of packing efficiency would be:

Q. In a fcc lattice, A, B, C and D atoms are arranged at corner, face center, octahedral void and tetrahedral void respectively, then the body diagonal contains :

Q. The number of tetrahedral and octahedral voids in hexagonal primitive unit cell are

Q. The number of tetrahedral and octahedral voids in CCP unit cell are respectively.