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diff --git a/3411/CH5/EX5.16/Ex5_16.sce b/3411/CH5/EX5.16/Ex5_16.sce
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+//Example 5_16
+clc();
+clear;
+//To calculate the difference between the samples
+d=0.2552
+a=d*sqrt(2)
+lamda=0.152       //units in nm
+theta=21          //units in degrees
+//For sample A
+d111=lamda/(2*sin(theta*%pi/180))      //units in nm
+h=1
+k=1
+l=1
+a=d111*sqrt(h^2+k^2+l^2)            //units in nm
+printf("For sample A a=%.4f nm",a)
+//For sample B
+theta=21.38
+d111=lamda/(2*sin(theta*%pi/180))      //units in nm
+h=1
+k=1
+l=1
+a=d111*sqrt(h^2+k^2+l^2)            //units in nm
+printf("\nFor sample B a=%.4f nm",a)
+printf("\n Sample B is pure high purity copper as lattice parameter of A is 1.75percent greater than that of pure copper")