IMA mineral species
Halloysite
Al₂Si₂O₅(OH)₄
Phyllosilicate mineral.
Properties
| Chemical formula | Al₂Si₂O₅(OH)₄ |
|---|---|
| Elements | Al, Si, O, H |
| Crystal system | Monoclinic |
| Mohs hardness | — |
| Density | — |
| Streak | — |
| Color | — |
| IMA symbol | Hly |
| Nickel–Strunz class | 9.ED.10 |
“—” means no reliable value in Wikidata yet. Check Mindat for full data.
🌍 Where it's found
Type locality (where it was first described): Angleur, Belgium
- Type locality
- Notable source / deposit
- Country of origin
Marker positions are approximate (region or locality level). Type localities from Wikidata; notable sources curated by Crystopedia.
Learn more
- Halloysite on Mindat.org
- Wikipedia article
- Wikidata item Q1314199 (source of this page's data – you can correct it there)
IMA mineral species
Monoclinic
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