Columbite-(Mn), Tantalite-(Mn), Cassiterite

Specimen ID: LAU-F39

Columbite-(Mn) : Mn2+Nb2O6
Tantalite-(Mn) : Mn2+Ta2O6
Mindat locality:

Photo added to

Zoned inclusion with tantalite-(Mn) in core (bright) and columbite-(Mn) in rim (dark upper left part), surrounded by cassiterite grains (medium-dark). SEM micrograph (BSE mode). The sample consists of fine- to coarse-grained cassiterite with minor quartz and muscovite.
Uwe Kolitsch - 24th September 2010
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