fixed typo

Author: Simon Gravelle

lammps-tutorials.tex

@@ -2422,7 +2422,7 @@ \subsubsection{System preparation}
 interactions between atoms of different types (i and j) by using
 geometric average: $\epsilon_{ij} = \sqrt{\epsilon_{ii} \epsilon_{jj}}$,
 $\sigma_{ij} = \sqrt{\sigma_{ii} \sigma_{jj}}$.  However, if the default
-value of $5.941\,\text{kcal/mol}$ was used for $\epsilon_\text{1-5}$,
+value of $1.472\,\text{kcal/mol}$ was used for $\epsilon_\text{1-5}$,
 the solid walls would be extremely hydrophilic, causing the water
 molecules to form dense layers.  As a comparison, the water-water energy
 $\epsilon_\text{1-1}$ is only $0.185199\,\text{kcal/mol}$.  Therefore,