Mineralienatlas - Fossilienatlas
Informations
Inserted from |
Diether G., Bodensee-Nord |
Collectors Summary
| Chemical Formula | MnO2 |
| Color | silbrig-schwarz, dunkel-grau |
| Streak color | schwarz, blau-schwarz |
| Lustre | Metallglanz |
| Hardness (Mohs) | 2 - 6.5 |
| Cleavages | vollkommen |
| Fracture | muschelig |
| Solubility | +++ HCl, NaHSO3, - HNO3 |
| Crystal System | tetragonal, P42/mnm |
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