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//Example 4_12
clc();
clear;
//To calculate distance betweenadjacent atoms
molwt=23+35.5 //units in grams/mol
avagadro=6.023*10^23 //units in gm/mol
mass=molwt/avagadro //units in gm
unitvol=2.18 //units in gm/cm^3
noofmol=unitvol/mass //units in gm/cm^3
total=2*noofmol //units in gm/cm^3
printf("number of atoms in NaCl is")
disp(total)
printf("atom/cm^3")
a=(1/total)^(1/3)
a=a*10^8 //units in A
printf("\nradius a=%.2f A",a)
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