I wanted to ask some reference about aluminum nitride hydrolysis in water. Specifically I would like to know if there is the formation of radicals or of some other reactive species.

  • $\begingroup$ Aluminum nitride $\ce{AlN}$ is made of one ion $\ce{Al^{3+}}$ and one nitride ion $\ce{N^{3-}}$. Both react with $\ce{H2O}$. The reaction is $\ce{AlN + 3 H2O -> Al(OH)3 + NH3}$. What sort of radicals do you want to introduce here ? $\endgroup$
    – Maurice
    Sep 21, 2022 at 7:57
  • 1
    $\begingroup$ To avoid duplicities, it would help responders if you wrote what you had been already searching for and where you had been already looking for it. $\endgroup$
    – Poutnik
    Sep 21, 2022 at 8:24
  • $\begingroup$ @Maurice I have learned to take nothing for granted when it comes to chemistry. Many phenomena can be more complex than they appear to be. $\endgroup$
    – Al1010
    Sep 24, 2022 at 5:00

1 Answer 1


I am quoting from this study[1]:

$\ce{AlN}$ powders hydrolyze in moist air at room temperature, resulting in degradation of the powders. The initial hydrolysis product is amorphous $\ce{AlOOH}$, which is further converted to a mixture of polymorphs of $\ce{Al(OH)3}$ (bayerite, nordstrandite, and gibbsite), forming agglomerates around the unreacted $\ce{AlN}$ core. In the hydrolysis each powder shows an induction period, which is attributed to slow hydrolysis of the surface oxide/oxyhydroxide layer. The powders produced by the carbothermal process show the longest induction periods.

$$ \begin{align} \ce{AlN + 2H2O → AlOOH_{amorph} + NH3} & \tag{R1}\\ \ce{AlOOH_{amorph} + H2O → Al(OH)3} & \tag{R2}\\ \\\hline \ce{AlN + 3H2O → Al(OH)3 + NH3}\\ \end{align} $$

You can find a detail explanation of the reaction in that study.


  1. Jinwang Li, Masaru Nakamura, Takashi Shirai, Koji Matsumaru, Chanel Ishizaki and Kozo Ishizaki, Hydrolysis of Aluminum Nitride Powders in Moist Air, 2005, DOI: 10.2240/azojomo0111

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