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+// Chapter 5 Example 8
+//==============================================================================
+clc;
+clear;
+
+//input data
+//Copper Crystallines in  FCC structure
+
+p       = 8960;             // Density of copper in kg/m^3
+N       = 6.023*10^26;      // Avagadros number in atoms/kilomole
+A       = 63.5;             // Atomic weight of copper in kg/mol
+n       = 4;                // No. of atoms per unit cell for FCC
+
+//Calculations
+
+a       = ((n*A)/(N*p))^(1/3);
+
+//Output
+
+mprintf('Lattice Constant a = %3.4f Å\n',a*10^10);
+mprintf(' atomic wt of copper is taken as 63.5*10^-3 instead of 63.5 in textbook')
+//==============================================================================