Synthesis in liquid aluminium

2 Synthesis in liquidAl Al as a reactive solvent Several intermetallic alu-minides have been prepared from liquid aluminium very often the separation of the compounds may be achieved through the dissolution of Al which dissolves readily in several non-oxidizing acids (for instance HC1). For a review on the reactions carried out in liquid aluminium and on several compounds prepared, see Kanatzidis et al. (2005) binary compounds are listed (Re-Al, Co-Al, Ir-Al) as well as ternary phases (lanthanide and actinide-transition metal aluminides). Examples of quaternary compounds (alumino-silicides, alumino-germanides of lanthanides and transition metals) have also been described. As an example, a few preparative details of specific compounds are reported in the following. 

Gd-Pt-Al compounds have been prepared by reacting Gd and Pt in the proper atomic ratio with a 10 fold excess of Al (Lattumer and Kanatzidis 2002). The mixture, placed in a silica tube sealed under vacuum was slowly heated to 1000°C, held at this temperature for several hours and slowly (over a few days) cooled to room temperature. The aluminium flux was removed by soaking the crucible in 5 M NaOH for 1 day. Gdi 33Pt3Al8, Gdo.67Pt2Al5 (and also compounds with Si) have been prepared the main product, however, in all the syntheses was GdAl3. 

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