| Name: | Pennantite Pnn |
| IMA Chemistry: | Mn2+5Al(Si3Al)O10(OH)8 |
| Chemistry Elements: | The mineral Pennantite contains elements: Manganese (Mn) Aluminum (Al) Silicon (Si) Oxygen (O) Hydrogen (H) |
| Country of Type Locality: | United Kingdom |
| Year First Published: | 1946 |
| IMA Status: | Approved,Grandfathered |
| Status Notes: | Smith W C, Bannister F A, Hey M H (1946) Pennantite, a new manganese-rich chlorite from Benallt mine, Rhiw, Carnarvonshire, Mineralogical Magazine 27, 217-220 |
| Structural Group Name: | Chlorite, Clay |
| Fleischer's Group Name: | chlorite |
| Crystal Systems: | orthorhombic |
| Oldest Known Age: | 1825 Million Years Ago |
| More Info: | Search Wikipedia: Pennantite (Wiki) Search Mindat: Pennantite Search Web Mineral DB: Pennantite |