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Lomonosovite: Na5Ti2O2(Si2O7)(PO4)
Comments: Aegerine schist with reddish crystalline grains of lomonosovite. Location: Ilimaussaq, Kvanefjeld, Greenland. Scale: Picture size 0.5 cm. © John Veevaert
Lomonosovite: Na5Ti2O2(Si2O7)(PO4) Bornemanite: BaNa3{(Na,Ti)4[(Ti,Nb)2O2Si4O14](F,OH)2}·PO4
Comments: Yellow crystalline bornemanite in dark brown lomonosovite. Location: Yubileinaya Pegmatite, Lovozero Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species