\begin{table}%t1
%\centering
\par
\caption{\label{tab:Proben}Properties of the samples.}
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\par
\begin{tabular}{ccccccc}
	\hline\hline
Material & Chemical formula & Product info & Processing & Grain size & Grain shape & Reference\\
	\hline
Spinel	& MgAl$_2$O$_4$	& Aldrich & & $<$0.1 $\mu$m & round & T09b, CSp2\\
	&		& Alfa Aesar & Sedimentation & $<$ 1 $\mu$m & irregular & T09b, CSP1\\
Corundum & Al$_2$O$_3$ & Alfa Aesar & & $<$0.3 $\mu$m & ellipsoidal & T09b, CAC1\\
	&		& GC Jena & Sedimentation & $<$2 $\mu$m & irregular & T09b, CAC2\\
Forsterite& Mg$_2$SiO$_4$ & Marusu & & $<$0.3 $\mu$m & ellipsoidal & T06b, CF2\\
	&		& Alfa Aesar & Sedimentation & $<$1 $\mu$m & irregular & T06b, CF1\\
\hline
\end{tabular} 
\end{table}