| Name: | Birnessite Bir |
| IMA Chemistry: | (Na,Ca,K)0.6(Mn4+,Mn3+)2O4·1.5H2O |
| Chemistry Elements: | The mineral Birnessite contains elements: Sodium (Na) Calcium (Ca) Potassium (K) Manganese (Mn) Oxygen (O) Hydrogen (H) |
| Country of Type Locality: | United Kingdom |
| Year First Published: | 1956 |
| IMA Status: | Approved,Grandfathered |
| Status Notes: | Jones L H P, Milne A A (1956) Birnessite, a new manganese oxide mineral from Aberdeenshire, Scotland, Mineralogical Magazine 31, 283-288 |
| Structural Group Name: | |
| Fleischer's Group Name: | |
| Crystal Systems: | triclinic|monoclinic |
| Oldest Known Age: | 2500 Million Years Ago |
| Mohs Hardness: | 1.5 |
| Diaphaneity: | 1.0 |
| Specific Gravity: | 3.0 |
| More Info: | Search Wikipedia: Birnessite (Wiki) Search Mindat: Birnessite Search Web Mineral DB: Birnessite |