| Name: | Ramsdellite Rmd |
| Specimens in Collection: |  #642: Ramsdellite Mistake Mine, Yavapai County, Arizona, USA |
| IMA Chemistry: | MnO2 |
| Chemistry Elements: | The mineral Ramsdellite contains elements: Manganese (Mn) Oxygen (O) |
| Country of Type Locality: | USA |
| Year First Published: | 1932 |
| IMA Status: | Approved,Grandfathered |
| Status Notes: | The mineral is described: Ramsdell L S (1932) An X-ray study of psilomelane and wad, American Mineralogist 17, 143-149 The mineral is named: Fleischer M, Richmond W E (1943) The manganese oxide minerals: a preliminary report, Economic Geology 38, 269-286 |
| Structural Group Name: | Ramsdellite |
| Fleischer's Group Name: | |
| Crystal Systems: | orthorhombic |
| Oldest Known Age: | 2400 Million Years Ago |
| More Info: | Search Wikipedia: Ramsdellite (Wiki) Search Mindat: Ramsdellite Search Web Mineral DB: Ramsdellite |