Description
Formula: (Fe,Mn)(Nb,Ta)2O6
System: Orthorombic
Series: Columbite-tanatlite series
Locality: Viitaniemi, Eräjärvi, Orivesi, Pirkanmaa, Finland
Habit: Lamellar
Color: Black
Luster: Submetallic
Weight: 264 g
Dimensions: 5.8 x 6.6 x 6.5 cm