Columbite-(Mn) Mineral Gallery

Columbite-(Mn) Mineral Gallery
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Columbite-(Mn) Minerals

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Columbite-(Mn) Mineral Gallery With 4 Images

Columbite-(Mn) Image

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Columbite-(Mn): (Mn,Fe++)(Nb,Ta)2O6  
Plumbopyrochlore: (Pb,Y,U,Ca)2-xNb2O6(OH)

Comments: Yellow-brown plumbopyrochlore crystalline crust over black manganocolumbite grain. Such plumbopyrochlore-manganocolumbite ovoids with different grade of replacement are very typical for the locality.
Location: Amazonite pegmatites of Ploskaya Mt, Western Keivy Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Picture Size 12x10 mm.
© Pavel M. Kartashov

Columbite-(Mn) Image

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Columbite-(Mn): (Mn,Fe++)(Nb,Ta)2O6

Comments: Small brown tabular crystals of manganocolumbite in a pegmatite.
Location: Neuland Quarry, Döbschütz, Königshain, Oberlausitz, Saxony, Germany. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Columbite-(Mn) Image

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Columbite-(Mn): (Mn,Fe++)(Nb,Ta)2O6  
Plumbopyrochlore: (Pb,Y,U,Ca)2-xNb2O6(OH)

Comments: Yellow-brown plumbopyrochlore crystalline crust over black manganocolumbite grain. Such plumbopyrochlore-manganocolumbite ovoids with different grade of replacement are very typical for the locality.
Location: Amazonite pegmatites of Ploskaya Mt, Western Keivy Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Picture Size 12x10 mm.
© Pavel M. Kartashov

Columbite-(Mn) Image

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Columbite-(Mn): (Mn,Fe++)(Nb,Ta)2O6

Comments: Small brown tabular crystals of manganocolumbite in a pegmatite.
Location: Neuland Quarry, Döbschütz, Königshain, Oberlausitz, Saxony, Germany. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag