Mineralienatlas - Fossilienatlas
Informations
Inserted from |
Diether G., Bodensee-Nord |
Collectors Summary
| Chemical Formula | K(Mg,Fe2+)3(Si3Al)O10(OH,F)2 |
| Color | schwarz, dunkelbraun, grünlichschwarz |
| Streak color | weiß, grauweiß |
| Lustre | Glasglanz |
| Hardness (Mohs) | 2 - 3 |
| Cleavages | vollkommen nach der Basis |
| Crystal System | monoklin, C2/m |
| Morphology | monoklin, tafelig oder kurzprismatische, pseudohexagonale Prismen, auch blättrige Aggregate und verstreute Blättchen |
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