High-purity alumina commodity Critical Material
Refined aluminium oxide product distinguished by its high purity. Geoscience Australia describes HPA as a white crystalline Al2O3 powder characterized by purity levels such as 99.99% Al2O3, with uses in lithium-ion batteries, electronics and optics. This grade-defined commodity is narrower than broad alumina and is distinct from aluminium metal, kaolin feedstock, bauxite and aluminium hydroxide. Its Australian designation specifically names high-purity alumina; it is not transferred to every aluminium-bearing feed or product. No microbial production or purification mechanism is asserted here.
Criticality Designations
| Jurisdiction | List Name | Edition / Document | Classification | Source |
|---|---|---|---|---|
| Australia | Australia's Critical Minerals List | 20 February 2024 update | critical |
australia-critical-2024
|
Sources & References
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ga-hpa-identity: Geoscience Australia, Critical minerals and their uses, updated 30 July 2024: High-purity Alumina, Properties, Usages and Geological Occurrence
https://www.ga.gov.au/scientific-topics/minerals/critical-minerals/critical-minerals-and-their-uses (accessed 2026-10-11) -
australia-critical-2024: Australian Government Department of Industry, Science and Resources, Australia's Critical Minerals List and Strategic Materials List: 20 February 2024 update, Table 1 High-purity Alumina entry
https://www.industry.gov.au/publications/australias-critical-minerals-list-and-strategic-materials-list (accessed 2026-10-11)
Curation History
| Timestamp | Curator | Action | Summary |
|---|---|---|---|
2026-10-11T08:30:09Z |
codex (GPT-6; codex) | create | Created a high-purity alumina commodity record for the named Australian grade. |
Record source: data/records/high-purity-alumina.yaml