| Name: | Halloysite Hly-7Å |
| Specimens in Collection: |  #1519: Quartz var. Mango / Halloysite Boyoca, Colombia |
| IMA Chemistry: | Al2Si2O5(OH)4 |
| Chemistry Elements: | The mineral Halloysite contains elements: Aluminum (Al) Silicon (Si) Oxygen (O) Hydrogen (H) |
| Country of Type Locality: | Belgium |
| Year First Published: | 1826 |
| IMA Status: | Approved,Grandfathered,Renamed |
| Status Notes: | Originally named halloysite: Berthier P (1826) Analyse de l'halloysite, Annales de Chimie et de Physique 32, 332-334 Name changed to halloysite-7Å: Bailey S W (1980) Summary of recommendations of the AIPEA nomenclature committee, The Canadian Mineralogist 18, 143-150 Name changed back to halloysite from halloysite-7Å: Hatert F, Mills S J, Pasero M, Miyawaki R, Bosi F (2023) CNMNC guidelines for the nomenclature of polymorphs and polysomes. Mineralogical Magazine 87, 225-232 |
| Structural Group Name: | Clay, Kaolinite |
| Fleischer's Group Name: | kaolinite-serpentine-kaolinite subgroup |
| Crystal Systems: | monoclinic |
| Oldest Known Age: | 460 Million Years Ago |
| More Info: | Search Wikipedia: Halloysite (Wiki) Search Mindat: Halloysite Search Web Mineral DB: Halloysite |