\begin{table}%t6
%\centering
\par
\caption{\label{coeff}Coefficients for Eqs.~(\ref{lincomb}) and~(\ref{lincomb_Fe}) to obtain temperature-independent abundance ratios.} 
\begin{tabular}{lccccc}
\hline\hline
Ratio  & $C_1$ & $C_2$ & $C_3$ & $C_4$ & $C_5$\\
\hline
 N/C      & +0.13 & $-0.07$ & +0.73& --  &--  \\
 O/N 	    & +0.30 & $+0.01$ & +0.93& --  &-- \\
 Ne/O     & +0.02 & $-0.17$ & +0.69& --  &--\\
 Mg/Ne    & +0.18 & $-0.08$ & +0.87& --  &--\\ 
 Si/Mg    & +0.32 & $+0.05$ & +0.86& --  &--\\  
 S/Si     & +0.42 & $+0.15$ & +0.85& --  &--\\
 Ne/Fe    & --   & --      & --  & +34.71 & +0.46\\ 
 Mg/Fe    & --   & --      & --  & +67.73 & $-0.30$\\
\hline
\end{tabular}
\end{table}