Ternary actinide-lanthanide oxide

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. 

As stated in the opening section of this chapter, the objective is to discuss and compare the solid-state chemistry and physics of the lanthanide and actinide element oxides. The topics of discussion have been limited to binary oxides of these elements. Therefore, a discussion of the many complex (ternary, mixed, etc.) oxide systems for these f elements, and oxides of actinides representing oxidation states above four that do not have lanthanide counterparts, are not present. 

The objective of this section of the chapter is to compare the properties and behaviors of the binary oxides of the lanthanide and actinide elements. The trends and the differences between the binary oxides of each series of elements are reviewed but a discussion of the more complex (e.g., ternary or larger) oxides that these elements are known to form is excluded. Essentially this section offers a comparison of the monoxides, sesquioxides, dioxides and binary oxides with 0/M ratios intermediate to those found in these three oxides. Since the lanthanide elements do not form oxides with higher O/M ratios than 2.0, actinide oxides with higher oxygen stoichiometries are not discussed in this section. 

Navrotsky, A., Systematic trends and prediction of enthalpies of formation of refractory lanthanide and actinide ternary oxide phases, Ceram. Trans., 119, (2001), 137-146. 

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