Johannsenite
Silicate mineral in the pyroxene family
From Wikipedia, the free encyclopedia
Johannsenite is a silicate mineral that is a member of the pyroxene family. The mineral can be produced in limestone or due a metamorphic process.[3] The mineral is also associated with Pb-Zn mineralization.[4]
| Johannsenite[1] | |
|---|---|
 | |
| General | |
| Category | Minerals |
| Formula | CaMn2+Si2O6 |
| IMA symbol | Jhn[2] |
| Crystal system | Monoclinic |
| Identification | |
| Color | blue-green, grey-white, dark brown, colourless |
| Mohs scale hardness | 6 |
| Streak | white |
It is a relatively rare material.[5] but is said to be abundant in the Aravaipa region of Arizona.[6] It is commonly found as a spherulite like aggregate.[7]
The mineral is vulnerable to oxidation, hydration, and carbonation. It is also commonly altered to rhodonite.[8]
The mineral was named in 1932 after Albert Johannsen.[9]