Aluminium carbonate

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Aluminium Carbonate
Names
IUPAC name
Dialuminum Tricarbonate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.034.930 Edit this at Wikidata
UNII
  • InChI=1S/3CH2O3.2Al/c3*2-1(3)4;;/h3*(H2,2,3,4);;/q;;;2*+3/p-6
    Key: PPQREHKVAOVYBT-UHFFFAOYSA-H
  • C(=O)([O-])[O-].C(=O)([O-])[O-].C(=O)([O-])[O-].[Al+3].[Al+3]
Properties
Al2(CO3)3
Appearance white powder, unstable
Density 1.5 g/cm3
Melting point 58 °C
Boiling point decomposes
reacts
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Aluminium carbonate (Al2(CO3)3), is a carbonate of aluminium. It is not well characterized; one authority says that simple carbonates of aluminium are not known.[1] However related compounds are known, such as the basic sodium aluminium carbonate mineral dawsonite (NaAlCO3(OH)2) and hydrated basic aluminium carbonate minerals scarbroite (Al5(CO3)(OH)13•5(H2O)) and hydroscarbroite (Al14(CO3)3(OH)36•nH2O).[2][3][4]

Preparation[]

There is no evidence that aluminium carbonate is formed in double displacement reactions; soluble carbonates are sufficiently alkaline to precipitate aluminium hydroxide and produce carbon dioxide.[5]

Although aluminium carbonate is highly unstable, carbonate species readily form on the surface of aluminium oxide when exposed to CO2.[6]

Uses[]

Aluminium carbonate, along with aluminium hydroxide and aluminium oxide, is a phosphate-binding drug that is sometimes administered to dogs and cats to bind intestinal phosphate and prevent the absorption of dietary phosphate as well as to decrease absorption of phosphate excreted by the pancreas. It is seldom used in humans because of concerns with toxicity, but cats and dogs do not appear to have a toxic response to its presence.[7]

The reaction of aluminium sulfate and sodium bicarbonate forms carbon dioxide and aluminium hydroxide which stabilises the formation of a foam.[5] This reaction was the basis of an early fire extinguisher invented by Aleksandr Loran in 1904.

References[]

  1. ^ Anthony John Downs, (1993), Chemistry of Aluminium, Gallium, Indium, and Thallium, Springer, ISBN 978-0-7514-0103-5
  2. ^ "Scarbroite". www.mindat.org.
  3. ^ "Hydroscarbroite". www.mindat.org.
  4. ^ "Dawsonite". www.mindat.org. Retrieved 2020-12-14.
  5. ^ a b Moody, Bernard (2013). Comparative Inorganic Chemistry. Elsevier. p. 311. ISBN 9781483280080.
  6. ^ 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: 410–417. doi:10.1039/J19690000410. ISSN 0022-4944.{{cite journal}}: CS1 maint: date and year (link)
  7. ^ Deborah Silverstein; Kate Hopper (13 February 2008). Small Animal Critical Care Medicine - E-Book. Elsevier Health Sciences. p. 5. ISBN 978-1-4160-6926-3.
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