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// Chapter 5 Example 7
//==============================================================================
clc;
clear;
// input data
// metallic iron changes from BCC to FCC form at 910 degress
rb = 0.1258*10^-9; // atomic radius of BCC iron atom
rf = 0.1292*10^-9; // atomic radius of FCC iron atom
// Calculations
ab = (4*rb)/(sqrt(3)); // lattice constant for BCC
Vbcc = (ab^3)/2; // volume occupied by one BCC atom
af = (4*rf)/(sqrt(2)) // lattice constant for FCC
Vfcc = (af^3)/4; // volume occupied by one FCC atom
dv = ((Vbcc-Vfcc)/Vbcc)*100 // percentage change in volume
// output
mprintf('During the structural change the percentage change in volume = %3.4f',dv);
//==============================================================================
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