THE ALUMINIUM – ALUMINIUM BROMIDE AND ALUMINIUM – ALUMINIUM IODIDE SYSTEMS

The Al–Al2Br6and Al–Al2I6binary systems have been investigated by cryoscopy and solubility measurements. Pure Al2BrGmelts at 98.01 ± 0.02 °C; the eutectic is found at 97.91 ± 0.02 °C and 0.017 wt. % Al; at 254 °C the solubility of aluminium increases to 0.0195 wt. %. Pure Al2I6melts at 188.32 ± 0.02 °C; the eutectic is found at 188.17 ± 0.02 °C and 0.018 wt. % Al; at 320 °C the solubility increases to 0.021 wt. % Al. From the results it is concluded that dissolved aluminium is present in the melt either as Al20dimer species or as associated molecules of Al4Br6and Al4I6.