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//Example number 1.2, Page number 10
clc;clear;
close;
//Variable declaration
e=1.6*10**-19; //charge(coulomb)
epsilon0=8.85*10**-12;
r0=0.41*10**-3; //equilibrium distance(m)
A=1.76; //madelung constant
n=0.5; //repulsive exponent value
//Calculation
Beta=72*%pi*epsilon0*r0**4/(A*e**2*(n-1)); //compressibility
//Result
printf( "compressibility = %.4e",Beta)
//answer in the book is wrong
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