Question 1
In any cubic lattice, an atom lying at the face of a unit cell is shared equally by how many unit cells?
◦
4◦
8◦
2◦
1◦
6Question 2
In the unit cell of sphalerite, Zn2+ ions occupy half the tetrahedral holes in a face-centered cubic lattice of S2- ions. The number of formula units of ZnS in the unit cell is:
◦
6.◦
4.◦
3.◦
2.◦
1.