| Name: | Arfvedsonite Arf |
| Specimens in Collection: |  #769: Arfvedsonite Poudrette Quarry, Mont St. Hilaire, Quebec, Canada |
| IMA Chemistry: | NaNa2(Fe2+4Fe3+)Si8O22(OH)2 |
| Chemistry Elements: | The mineral Arfvedsonite contains elements: Sodium (Na) Iron (Fe) Silicon (Si) Oxygen (O) Hydrogen (H) |
| Country of Type Locality: | Denmark (Greenland) |
| Year First Published: | 1823 |
| IMA Status: | Approved,Redefined |
| Status Notes: | Brooke H J (1823) A description of the crystalline form of some new minerals. Arfwedsonite, The Annals of Philosophy 5, 381-384 |
| Structural Group Name: | Amphibole |
| Fleischer's Group Name: | amphibole-group 4 Na |
| Crystal Systems: | monoclinic |
| Oldest Known Age: | 2500 Million Years Ago |
| Mohs Hardness: | 5.5 |
| Diaphaneity: | 1.0 |
| Specific Gravity: | 3.4 |
| More Info: | Search Wikipedia: Arfvedsonite (Wiki) Search Mindat: Arfvedsonite Search Web Mineral DB: Arfvedsonite |