Aluminium carbonate

Aluminium carbonate
CAS number 14455-29-9
ChemSpider 10606614 YesY
Jmol-3D images Image 1
Molecular formula C3Al2O9
Molar mass 233.99 g mol−1
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Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Aluminium carbonate (Al2(CO3)3), is a carbonate of aluminium. It is a component of the mineral strontiodesserite.[1]


It is formed in the reaction between an aluminium compound, such as aluminium sulfate (Al2(SO4)3), and sodium carbonate (Na2CO3):

Al2(SO4)3 + 3 Na2CO3 → Al2(CO3)3 + 3 Na2SO4


Aluminium carbonate is an unstable compound, decomposing to aluminium hydroxide (Al(OH)3) and carbon dioxide (CO2):

Al2(CO3)3 + 3 H2O → 2 Al(OH)3 + 3 CO2

Aluminium carbonate readily decomposes into carbon dioxide and aluminium hydroxide, which is exploited by many fire extinguishers due to the inert nature of the carbon dioxide.

See also


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