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Penkvilksite
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| Mineral: | Penkvilksite: Na4(Ti++++,Zr)2[Si8O22]ยท4(H2O) | ||||
| Comments: | Massive white cluster of Penkvilksite. | ||||
| Location: | Lovozero, Kola Peninsula, Russia. | ||||
| Scale: | .5 x 2.5 cm. | ||||
| Copyright: | © John Veevaert | ||||
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