\begin{table}%t3
\caption{\label{comp.clementini}Comparison between the atmospheric ion abundances relative to the Sun 
obtained by Clementini et~al. (\cite{Clementini1995}) and in this work. }
\small%\centering
\par
\begin{tabular}{lccc}
\hline
\hline\noalign{\smallskip}
Ion &\multicolumn{3}{c}{[$N_{\rm el}/N_{\rm H}$]$_{\rm Sun}$} \\                    
 & \multicolumn{2}{c}{This work} & Clementini et~al. (\cite{Clementini1995}) \\
\hline
\ion{O}{i}    & ~$-$0.60~$\pm$~0.04 & ~$-$0.59~$\pm$~0.04 & ~$-$0.69          \\	  
\ion{Na}{i}   & ~$-$1.51~$\pm$~0.05 & ~$-$1.51~$\pm$~0.05 & ~$-$1.39          \\	  
\ion{Mg}{i}~  & ~$-$1.03~$\pm$~0.10 & ~$-$0.97~$\pm$~0.14 & ~$-$1.08~$\pm$~0.07 \\	   
\ion{Al}{i}   & ~$-$0.92~$\pm$~0.26 & ~$-$0.90~$\pm$~0.26 & ~$-$1.89          \\	   
\ion{Si}{i}   & ~$-$1.03~$\pm$~0.11 & ~$-$1.02~$\pm$~0.11 & ~$-$0.92~$\pm$~0.02 \\	   
\ion{Si}{ii}  & ~$-$1.08~$\pm$~0.04 & ~$-$1.01~$\pm$~0.08 & ~$-$1.14          \\	   
\ion{Ca}{i}   & ~$-$1.25~$\pm$~0.05 & ~$-$1.17~$\pm$~0.09 & ~$-$1.07~$\pm$~0.05 \\	   
\ion{Sc}{ii}  & ~$-$1.18~$\pm$~0.13 & ~$-$1.19~$\pm$~0.09 & ~$-$1.35~$\pm$~0.12 \\	   
\ion{Ti}{i}   & ~$-$1.19~$\pm$~0.08 & ~$-$1.18~$\pm$~0.07 & ~$-$1.20~$\pm$~0.06 \\	   
\ion{Ti}{ii}  & ~$-$1.07~$\pm$~0.19 & ~$-$1.08~$\pm$~0.13 & ~$-$1.05~$\pm$~0.18 \\	   
\ion{Cr}{i}   & ~$-$1.58~$\pm$~0.09 & ~$-$1.54~$\pm$~0.09 & ~$-$1.41~$\pm$~0.18 \\	   
\ion{Cr}{ii}  & ~$-$1.30~$\pm$~0.11 & ~$-$1.26~$\pm$~0.10 & ~$-$1.33~$\pm$~0.14 \\	   
\ion{Mn}{i}   & ~$-$1.82~$\pm$~0.15 & ~$-$1.77~$\pm$~0.12 & ~$-$1.99~$\pm$~0.12 \\	   
\ion{Fe}{i}   & ~$-$1.48~$\pm$~0.12 & ~$-$1.44~$\pm$~0.11 & ~$-$1.39~$\pm$~0.13 \\	   
\ion{Fe}{ii}  & ~$-$1.34~$\pm$~0.13 & ~$-$1.30~$\pm$~0.10 & ~$-$1.39~$\pm$~0.13 \\	   
\ion{Ni}{i}   & ~$-$1.54~$\pm$~0.08 & ~$-$1.52~$\pm$~0.08 & ~$-$1.47          \\	   
\ion{Zn}{i}   & ~$-$1.57~$\pm$~0.01 & ~$-$1.55~$\pm$~0.01 & ~$-$1.35          \\	   
\ion{Y}{ii}   & ~$-$1.48~$\pm$~0.09 & ~$-$1.47~$\pm$~0.09 & ~$-$1.50          \\	   
\ion{Ba}{ii}  & ~$-$1.36~$\pm$~0.22 & ~$-$1.48~$\pm$~0.08 & ~$-$1.39~$\pm$~0.12 \\	     \noalign{\smallskip}		
\vmic     & 3.1~\kms & Depth dep. & ~4.2~\kms \\ 			     
\hline   
\end{tabular} 
\end{table}