Aluminium carbonate

Preparation

For many years there was no evidence for the existence of a simple aluminium carbonate, , as the combination of Al3+ and carbonates are sufficiently alkaline to precipitate aluminium hydroxide and produce carbon dioxide: :2[Al(H2O)6]^{3+}(aq) + 3CO3^{2-}(aq) - 2Al(OH)3 (s) + 3CO2 (g) + 9H2O (l) However, in 2023, was produced by heating aluminium oxide at 2300 °C under 24 GPa of carbon dioxide. The resulting solid is stable in air and at room temperature.

Some minerals contain both aluminium and carbonate. Dawsonite has the formula NaAlCO3(OH)2. Hydrotalcites, both synthetic and natural, are layered metal hydroxides comprised in part of aluminium and carbonate.

Surface carbonate species readily form upon exposure of aluminium oxide to .

References

References

1. (2023). "CCDC 2259169: Experimental Crystal Structure Determination". Cambridge Crystallographic Data Centre.
2. Anthony John Downs, (1993), ''Chemistry of Aluminium, Gallium, Indium, and Thallium'', Springer, {{ISBN. 978-0-7514-0103-5
3. "Scarbroite".
4. "Hydroscarbroite".
5. "Dawsonite".
6. (2013). "Comparative Inorganic Chemistry". Elsevier.
7. (28 August 2023). "Anhydrous Aluminum Carbonates and Isostructural Compounds". Inorganic Chemistry.
8. (1998). "New Synthetic Routes to Hydrotalcite-Like Compounds − Characterisation and Properties of the Obtained Materials". European Journal of Inorganic Chemistry.
9. Parkyns, N. D.. (1969-01-01). "The surface properties of metal oxides. Part II. An infrared study of the adsorption of carbon dioxide on γ-alumina". Journal of the Chemical Society A: Inorganic, Physical, Theoretical.