# Encyclopedia article about aluminium # Document type: Dictionary (absolute notation) {article}: uuid: 0c5aacfe-d828-43c7-a530-12a802af1df4 type: chemical-element key: aluminium title: Aluminium description: The <@element>:{chemical element} aluminium. tags: [metal; common] {chemical-element}: symbol: Al number: 13 stp-phase: melting-point: 933.47 boiling-point: 2743 density: 2.7 electron-shells: [2; 8; 3] {references}: wikipedia: \https://en.wikipedia.org/wiki/Aluminium snl: \https://snl.no/aluminium {links}: element: 740097ea-10fa-4203-b086-58632f099167 chemsym: 6e2f634c-f180-407a-b9ce-2138b412b248 atomnum: 1a5e1974-a78c-4820-afeb-79bef6974814 react: ab7d8a1f-c028-4466-9bb2-41a39d153241 aloxide: c1ff08e7-a88f-42d5-83c3-6adc4835a07b stab: b3b13474-4fe3-4556-9568-925c066916a5 purity: 40786551-85c4-461c-ba6e-4d54d5863820 ion: effd5c7a-da31-4357-a94c-91343e9a05eb metal: 84333088-cfcc-4e78-8d3f-7307dcab144b [content]:

: Aluminium

: <@self>:Aluminium is a <@element>:{chemical element} with <@chemsym>:{chemical symbol} and <@atomnum>:{atomic number} .

: Substance

: In <@purity>:pure form, it is a highly <@react>:reactive {<@metal>:metal}, but normally a thin coat of <@aloxide>:{aluminium oxide} forms on its surface, keeping it highly {<@stab>:stable}.

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: Occurrence

: In nature, it occurs as the <@ion>:ion <$>:{:{Al}^{3+}}. It constitutes <$>:8.2% of the earth's crust, making it the most common <@metal>:metal found there.

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