| Name: | Johannsenite Jhn |
| IMA Chemistry: | CaMnSi2O6 |
| Chemistry Elements: | The mineral Johannsenite contains elements: Calcium (Ca) Manganese (Mn) Silicon (Si) Oxygen (O) |
| Country of Type Locality: | Italy / USA |
| Year First Published: | 1938 |
| IMA Status: | Approved |
| Status Notes: | Johannsenite, a new manganese pyroxene (1938) Schaller W T, American Mineralogist 23, 575-582 |
| Structural Group Name: | Pyroxene |
| Fleischer's Group Name: | pyroxene |
| Crystal Systems: | monoclinic |
| Oldest Known Age: | 2222.9 Million Years Ago |
| More Info: | Search Wikipedia: Johannsenite (Wiki) Search Mindat: Johannsenite Search Web Mineral DB: Johannsenite |