Plumbopyrochlore Columbite-(Fe) Image

Plumbopyrochlore Columbite-(Fe) Image
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 Columbite-(Fe), Plumbopyrochlore

Large Columbite-(Fe) Image

Mineral: Columbite-(Fe): Fe++Nb2O6  
Plumbopyrochlore: (Pb,Y,U,Ca)2-xNb2O6(OH)
Comments: Brown plumbopyrochlore crystal with dark brown ferrocolumbite (columbite-(Fe)).
Location: Holdazan, Buregteg, Mongolia.
Scale: See Photo.
Copyright: © Jeff Weissman / Photographic Guide to Mineral Species
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