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//Example number 8.3, Page number 8.17
clc;clear;close
// Variable declaration
a=(2*2.82*10^-10) // in m
delta_Hs=1.971*1.6*10^-19 // unitless
k=1.38*10^-23 // Constant
T=300 // in K
// Calculations
V=a^3 // Volume of unit cell of NaCl
N=4/V // Total number of ion pairs
n=N*exp(-delta_Hs/(2*k*T)) //concentration in per m^3
// Result
printf("Volume of unit cell of NaCl = %.3e m^3",V)
printf("\nTotal number of ion pairs ''N'' = %.2e",N)
printf("\nThe concentration of Schottky defects per m^3 at 300K = %.2e",n)
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