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+//Chapter 10 : Crystallography and Crystal Imperfections
+
+clear;
+
+//Variable declaration
+M=58.45               //formula weigth
+rho=2.17*10**3        //density of material
+n=4                   //No. of atoms/cell              
+No=6*10**26           //Avagadro's No.
+
+//Calculations
+a=((n*M)/(No*rho))**(1/3)/10**-10
+
+//Result
+mprintf("Lattice constant a= %.3f*10**-10 m",a)