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clear
//
//
//
//Variable declaration
h=1
k=1
l=1 //miller indices
r=1.278*10**-10 //radius(m)
//Calculation
a=4*r/sqrt(2)
d111=a/sqrt(h**2+k**2+l**2) //interplanar spacing(m)
//Result
printf("\n interplanar spacing is %0.2f *10**-10 m",d111*10**10)
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