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Marianoite: Na2Ca4(Nb,Zr)2(Si2O7)2(O,F)4
Comments: PPL image of euhedral crystals of marianoite, titanite and U-rich pyrochlore in the phlogopite-calcite silicocarbonatite. (CanMin, v46:1023). Location: Mesoproterozoic Prairie Lake intrusive complex, in northwestern Ontario, Canada. Scale: See Image. © Canadian Mineralogist
Comments: SEM images showing the morphology of marianoite crystals, (CanMin, v46:1023). Location: Mesoproterozoic Prairie Lake intrusive complex, in northwestern Ontario, Canada. Scale: See Images. © Canadian Mineralogist