Question

14-15 4-15 ZnS has the zinc blende structure. If the density is 3.02 g/cm3 and the lattice parameter is 0.59583 nm, determine the number of Schottky defects (a) per unit cell; and (b) per cubic centimeter. ​

Answer 1

Step 1 of 4

a)

Express the theoretical density of zinc blende structure.

…… (1)

Here, Avogadro number is , number of zinc atoms per unit cell is , atomic mass of zinc in is , atomic mass of sulfide in is , and lattice parameter is .

From the physical properties of elements table, select the atomic mass of zinc and sulfide as and , respectively.