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Lepkhenelmite-Zn: Ba2Zn(Ti,Nb)4(Si4O12)2(O,OH)4·7(H2O)
Comments: B&W image of fragments of lepkhenelmite-Zn. Location: Lepkhe-Nel'm Mt., Lovozero, Kola, Russia. Scale: See Image. © Diederik Visser