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Vuonnemite: Na11Nb2TiSi4O12(PO4)2O5F2 Lorenzenite: Na2Ti2Si2O9
Comments: Square vuonnemite crystal with brown, lorenzenite crystals in syenite rock. Location: Ilimaussaq, Greenland. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Vuonnemite: Na11Nb2TiSi4O12(PO4)2O5F2 Ussingite: Na2AlSi3O8(OH)
Comments: Massive, violet colored ussingite with a single bladed partial crystal of white vuonnemite 1.5 cm in length. Location: Mt. Karnasurf, Lovozero, Russia. Scale: 4.2 x 3 cm. © John Veevaert