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Alsakharovite-Zn: NaSrKZn(Ti,Nb)4(Si4O12)2(O,OH)4·7(H2O)
Comments: Light brown crystal fragment of alsakharovite-Zn. Location: Lepkhe Nelm Mountain, Lovozero, Kola Peninsula, Russia. Scale: Crystal size 2 mm. © Thomas Witzke / Abraxas-Verlag