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Aluminum Fluoride
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Inorganics
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Inorganic Fluorine Compounds
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Description

Aluminium Trifluoride (AlF₃) is the principal and only anhydrous aluminium fluoride. It is an inorganic compound of aluminium and fluorine, serving as a critical additive in primary aluminium smelting and a key chemical intermediate across several industrial sectors. It appears as a white, free-flowing crystalline powder that is chemically stable, non-flammable, and non-hazardous under normal handling conditions.

Aluminium fluoride occurs in several hydrated forms in addition to the commercially dominant anhydrous compound:​

Form Formula Notes
Anhydrous AlF₃ Primary industrial grade
Monohydrate AlF₃·H₂O Intermediate form
Trihydrate AlF₃·3H₂O Produced via wet process route;
natural form = Rosenbergite
Nonahydrate AlF₃·9H₂O Laboratory form


Its natural mineral forms are Óskarssonite (anhydrous) and Rosenbergite (trihydrate) 

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UserPic Fournier-Paradis, Jacob
2026/02/24 03:42 AM
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Aluminium Fluoride is a critical inorganic fluoride compound for industrial aluminium smelting

Aluminum fluoride (AlF3)  is a critical additive used in aluminum production, making the Hall-Héroult process physically and economically possible.The additive is added to the liquid bath of cryolite (Na3AlF6) and dissolved alumina. Adding aluminum fluoride lowers the melting...

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Unit of Measure
Metric Ton
Physical State

Solid

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Modified by UserPic  Kokel, Nicolas 2/25/2026 9:12 AM
Added 2/24/2026 3:27 AM