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diff --git a/1694/CH1/EX1.18/EX1_18.sce b/1694/CH1/EX1.18/EX1_18.sce
new file mode 100644
index 000000000..246c80dc5
--- /dev/null
+++ b/1694/CH1/EX1.18/EX1_18.sce
@@ -0,0 +1,13 @@
+clear;
+clc;
+printf("\nEx1.18\n");
+//page no.-32
+//given
+n=2;...........//no. of atoms per unit cell
+M=55.85;........//atomic wt. of Ge
+N=6.02*10^26;....//avagadro no.
+rho=7860;........//density in Kg/m^3
+
+a=((n*M)/(rho*N))^(1/3)........//lattice constant in angstrom
+
+printf("\nlattice constant is 0.286 angstrom\n");