\begin{table}%t8
\caption{\label{cfrtab}Compilation  of abundance  determinations  in the  literature
  from  spectroscopic data.}
\small%\centering
\par
\begin{tabular}{c c c c c c c}
  \hline\hline\noalign{\smallskip}
Cluster   &   Source    &[Fe/H]             &[Na/H]               &[Al/H]              &[Si/H]                &  Ref. \\
\hline
  IC 4756 & 3 dwarfs    & 0.01 $\sigma=0.04$& $-0.15 \sigma= 0.04$& $-0.09 \sigma=0.05$& $-0.04 \sigma=0.04$  &  1   \\
  IC 4756 & 1 dwarf     & 0.03  --          &                     &                    &                      &  4   \\
\noalign{\smallskip}
  IC 4756 & 3 giants    & 0.08 $\sigma=0.02$&  $0.19 \sigma= 0.04$& $ -0.03\sigma=0.05$&  0.10 $\sigma=0.01$  &  1, 2 \\
  IC 4756 & 7 giants    & $0.0  \pm0.1$   * &                     &                    &                      &  3   \\
  IC 4756 & 4 giants    &$-0.05 \pm 0.04$    &                     &                    &                      &  4   \\
  IC 4756 & 1 giant     &                   &                     &0.20                &0.16~$\pm$~0.25         &  4   \\
  IC 4756 & 6 giants    &$-0.15 \sigma =0.04$& 0$.73 \sigma= 0.06$ *&0.44 $\sigma=0.08$ *&  0.19 $\sigma=0.06$  &  5   \\
\noalign{\smallskip}
 NGC 5822 & 2 dwarfs    & $0.05 \sigma=0.03$& $-0.15 \sigma= 0.0$4&$ -0.05$ --           &  $0.01 \sigma=0.02$  &  1   \\
\\
 NGC 5822 & 3 giants    & $0.15 \sigma=0.08$&  $0.21 \sigma= 0.04$&  $0.02 \sigma=0.01$&  $0.14 \sigma=0.08$  &  1, 2 \\
 NGC 5822 & 3 giants    & $0.12 \sigma=0.1$ &                     &                    &                      &  4   \\
 NGC 5822 & 1 giant     &                   & 0.28~$\pm$~0.07       &0.12~$\pm$~0.12       &0.25~$\pm$~0.25         &  4   \\
\noalign{\smallskip}
\hline
          &             &[Ca/H]             &[Ti/H]               &[Cr/H]              &[Ni/H]                &      \\
  IC 4756 & 3 dwarfs    & $0.05 \sigma=0.05$& $-0.04 \sigma= 0.05$&  $0.00 \sigma=0.05$& $-0.06  \sigma=0.03$  &  1   \\
\\
  IC 4756 & 3 giants    & $0.06 \sigma=0.03$&  $0.11 \sigma= 0.03$&  $0.08 \sigma=0.03$&  $0.04 \sigma=0.01$  &  1, 2 \\
  IC 4756 & 1 giant     &$-0.06\pm0.29$     & $-0.28\pm0.29$      &                    &0.04~$\pm$~0.16         &  4   \\
  IC 4756 & 6 giants    &$-0.08 \sigma=0.08$&                     &                    & $-0.07 \sigma=0.05$  &  5   \\
\noalign{\smallskip}
 NGC 5822 & 2 dwarfs    & $0.08 \sigma=0.0$2&  $0.00 \sigma= 0.02$&  $0.07 \sigma=0.04$& $-0.03$ $\sigma=0.03$  &  1   \\
\\
 NGC 5822 & 3 giants    & $0.11 \sigma=0.07$&  $0.18 \sigma= 0.11$&  $0.18 \sigma=0.08$&  0.07 $\sigma=0.14$  &  1, 2 \\
 NGC 5822 & 1 giant     &$- 0.05 \pm 0.23$     &  $0.20 \pm 0.24$      &$0.26 \pm 0.29$       &$0.25 \pm 0.26$         &  4   \\ 
 \hline
\end{tabular}
\tablebib{(1) Present work;
  (2) \cite{giants};
  (3) \cite{groy};
  (4) \cite{luck};
  (5) \cite{rv_ic}.} 
\end{table}