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+// Chapter 5 Example 16
+//==============================================================================
+clc;
+clear;
+// Magnesium has HCP structure
+// for HCF(Hexagonal closed packed structure) consider the relation between 'c' and 'a';
+// c/a = sqrt(8/3) = 1.6329 
+//input data
+r   = 0.1605*10^-9;     // radius of magnesium atom in m
+
+// Calculations
+
+a   = 2*r               // lattice constant of HCP
+c   = a*sqrt(8/3);      // relation b/w c and a in HCP
+V   = (3*3^0.5)*(a*a*c)/2;      //Volume of unit cell in m^3
+
+// Output
+mprintf('Volume of the unit cell of magnesium = %3.3e m^3',V);
+//==============================================================================
+