  High quality single crystals of Cs$_2$Au$_2$X$_6$ (X=Br,I) were grown using a
ternary self-flux method. Structural refinements based on single crystal X-ray
diffraction measurements show that both materials have a distorted perovskite
structure belonging to the I4/mmm space group with full site occupancy.
Transport measurements reveal a large bandgap of 550 $\pm$ 100 meV for
Cs$_2$Au$_2$I$_6$ and 520 $\pm$ 80 meV for Cs$_2$Au$_2$Br$_6$. Initial attempts
at chemical substitution are described.
