\begin{table}%t4
  %\centering
\par
  \caption{\label{tab:kappa-table}Like \Tb{growth-table} but for the geometrical opacity $\kappa$ of the particles.}
\begin{tabular}{lllllll}
  \hline
  \hline
  & \multicolumn{6}{c}{$\langle \kappa \rangle\ [{\rm cm}^2\ {\rm g}^{-1}]$} \\
  \cline{2-7} \\[-3.5mm]
  Model &  $10^4\ {\rm yr}$&  $10^5\ {\rm yr}$&  $10^6\ {\rm yr}$&  $10^7~ {\rm yr}$  & $t_{\rm ff}(n)$ & $t_{\rm ad}(n)$\\
  (1) & (2) & (3) & (4) & (5) & (6) & (7)\\
  \hline
$n=10^3$, ice & {$2.8(4)$} & {$2.8(4)$} & {$2.7(4)$} & {$1.5(4)$} & {$2.7(4)$} & {$1.5(4)$} \\ 
$n=10^4$, silicates & {$2.8(4)$} & {$2.8(4)$} & {$2.7(4)$} & {$2.6(4)$} & {$2.7(4)$} & {$2.6(4)$} \\ 
$n=10^4$, ice & {$2.8(4)$} & {$2.8(4)$} & {$2.0(4)$} & {$2.5(3)$} & {$2.6(4)$} & {$2.5(3)$} \\ 
$n=10^5$, silicates & {$2.8(4)$} & {$2.5(4)$} & {$2.0(4)$} & {$2.0(4)$} & {$2.5(4)$} & {$2.0(4)$} \\ 
$n=10^5$, silicates, $a_0=10^{-4}$ & {$2.8(3)$} & {$2.8(3)$} & {$2.8(3)$} & {$2.8(3)$} & {$2.8(3)$} & {$2.8(3)$} \\ 
$n=10^5$, ice & {$2.8(4)$} & {$2.4(4)$} & {$5.1(3)$} & {$2.3(3)$} & {$2.4(4)$} & {$8.4(2)$} \\ 
$n=10^5$, ice, $a_0=10^{-4}$ & {$2.8(3)$} & {$2.8(3)$} & {$2.4(3)$} & {$2.4(3)$} & {$2.8(3)$} & {$2.4(3)$} \\ 
$n=10^5$, ice, $a_0=3\times10^{-6}$ & {$9.3(4)$} & {$7.1(4)$} & {$1.4(4)$} & {$4.4(2)$} & {$6.9(4)$} & {$1.7(3)$} \\ 
$n=10^5$, ice, compact & {$2.8(4)$} & {$2.6(4)$} & {$8.0(3)$} & {$1.9(3)$} & {$2.6(4)$} & {$1.0(3)$} \\ 
$n=10^5$, ice, head-on & {$2.8(4)$} & {$2.4(4)$} & {$4.9(3)$} & {$3.1(3)$} & {$2.4(4)$} & {$9.3(2)$} \\ 
$n=10^6$, silicates & {$2.7(4)$} & {$1.4(4)$} & {$1.4(4)$} & {$1.4(4)$} & {$2.0(4)$} & {$1.4(4)$} \\ 
$n=10^6$, ice & {$2.7(4)$} & {$1.2(4)$} & {$6.7(2)$} & {$2.2(3)$} & {$2.0(4)$} & {$1.5(3)$} \\ 
$n=10^7$, ice & {$1.7(4)$} & {$1.8(3)$} & {$1.4(3)$} & {$1.7(3)$} & {$1.6(4)$} & {$6.4(2)$} \\ 
  \hline
\end{tabular}
\end{table}