\begin{table}%t3
 \caption{\label{12745tb3}Measurements of silicon, iron and nickel abundances relative to
 the solar value \citep{anders89} for the final sample (26 clusters for
 Si and Fe, 23 for Ni) from the 4T {\it mekal} spectral model. }
 \small%\centerline
{
\begin{tabular}{rlccc }
 \hline \hline
Seq. & Cluster & Si & Fe & Ni \\
\hline
1  & Perseus       &  $0.77\pm  0.03$ & $0.49\pm  0.02$ & $1.27\pm  0.11$ \\
2  & Virgo(M87)    &  $0.95\pm  0.07$ & $0.41\pm  0.02$ & $             $ \\
3  & 2A $0335+096$ &  $0.73\pm  0.04$ & $0.48\pm  0.02$ & $1.03\pm  0.06$ \\
4  & Centaurus     &  $1.62\pm  0.16$ & $0.94\pm  0.03$ & $2.50\pm  0.17$ \\
5  & Abell~478     &  $0.36\pm  0.08$ & $0.43\pm  0.02$ & $0.62\pm  0.16$ \\
6  & Abell~1795    &  $0.68\pm  0.04$ & $0.47\pm  0.02$ & $0.89\pm  0.11$ \\
7  & Abell~2597    &  $0.40\pm  0.09$ & $0.37\pm  0.02$ & $0.79\pm  0.51$ \\
8  & Abell~4038    &  $0.49\pm  0.08$ & $0.42\pm  0.03$ & $1.50\pm  0.23$ \\
9  & Abell~1060    &  $0.73\pm  0.07$ & $0.42\pm  0.02$ & $             $ \\
10 & MKW3s         &  $0.78\pm  0.07$ & $0.48\pm  0.02$ & $1.36\pm  0.75$ \\ 
11 & Abell~2052    &  $0.77\pm  0.03$ & $0.55\pm  0.02$ & $1.35\pm  0.09$ \\ 
12 & Abell~2199    &  $0.92\pm  0.10$ & $0.45\pm  0.02$ & $1.11\pm  0.41$ \\ 
13 & Abell~2029    &  $0.61\pm  0.15$ & $0.58\pm  0.03$ & $1.66\pm  0.86$ \\ 
14 & Abell~3112    &  $0.77\pm  0.10$ & $0.58\pm  0.04$ & $1.17\pm  0.43$ \\ 
15 & HYDRA A       &  $0.46\pm  0.11$ & $0.39\pm  0.02$ & $0.75\pm  0.13$ \\ 
16 & Abell~496     &  $0.85\pm  0.06$ & $0.55\pm  0.02$ & $1.72\pm  0.37$ \\ 
17 & AWM7          &  $1.13\pm  0.07$ & $0.64\pm  0.02$ & $1.24\pm  0.30$ \\ 
18 & ABELL 4059    &  $0.78\pm  0.03$ & $0.59\pm  0.04$ & $1.00\pm  0.12$ \\ 
19 & Abell~3571    &  $0.52\pm  0.15$ & $0.48\pm  0.03$ & $1.81\pm  0.09$ \\ 
20 & Abell~1650    &  $0.36\pm  0.16$ & $0.57\pm  0.03$ & $1.11\pm  0.62$ \\ 
21 & Abell~1689    &  $0.40\pm  1.68$ & $0.33\pm  0.03$ & $1.96\pm  0.33$ \\ 
22 & PKS $0745-191$&  $0.61\pm  0.22$ & $0.43\pm  0.03$ & $0.49\pm  0.22$ \\ 
23 & Abell~262     &  $0.93\pm  0.06$ & $0.53\pm  0.06$ & $             $ \\
24 & Abell~2204    &  $0.83\pm  0.24$ & $0.53\pm  0.03$ & $1.27\pm  0.49$ \\ 
25 & Abell~85      &  $0.94\pm  0.23$ & $0.55\pm  0.02$ & $2.49\pm  0.74$ \\ 
26 & Abell~3558    &  $0.84\pm  0.36$ & $0.49\pm  0.02$ & $1.68\pm  1.15$ \\ 
\hline
\end{tabular}}
\smallskip
 Clusters
 are sorted by decreasing counts statistics in the {\it pn}. Errors on
 abundances include a $3\%$ systematic error as detailed in Sect.~4.3.
 \end{table}