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Biotite, Wohlerite
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| Mineral: | Biotite: K(Mg,Fe++)3[AlSi3O10(OH,F)2 Wohlerite: NaCa2(Zr,Nb)Si2O7(O,OH,F)2 | |||||
| Comments: | Prismatic wohlerite crystals with lepidomelane (Fe-rich biotite). | |||||
| Location: | Langevannet, Tvedalen, Telemark, Norway. | |||||
| Scale: | See Photo. | |||||
| Copyright: | © Jeff Weissman / Photographic Guide to Mineral Species | |||||
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