Mineralienatlas - Fossilienatlas
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Inserted from |
Diether G., Bodensee-Nord |
Collectors Summary
| Chemical Formula | (gamma-MnO2)Mnx2+Mn1-x4+O2-2x(OH)2x |
| Color | dunkelgrau bis schwarz |
| Streak color | schwarz |
| Lustre | Metallglanz, erdig |
| Hardness (Mohs) | 6.5 - 8.5 |
| Solubility | +++ HCl |
| Crystal System | hexagonal, |
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