Wodginite

Wodginite
Wodginite over cassiterite
General
Category	Oxide - Tantalate mineral
Formula (repeating unit)	Mn2+(Sn,Ta)Ta2O8
Strunz classification	4.DB.40
Dana classification	08.01.08.01
Crystal system	Monoclinic
Crystal class	Prismatic (2/m) (same H-M symbol)
Identification
Color	Reddish brown, dark brown to black
Crystal habit	Flattened dipyramidal to prismatic crystals in radiating groups; granular, massive.
Twinning	Very common as penetration twins
Cleavage	none
Fracture	Irregular
Tenacity	Brittle
Mohs scale hardness	5.5
Luster	Sub-metallic
Streak	Brown
Diaphaneity	Opaque, translucent in thin fragments
Specific gravity	7.19–7.36
References

Wodginite is a manganese, tin, tantalum oxide mineral with formula Mn²⁺(Sn,Ta)Ta₂O₈. It may include significant niobium.

Wodginite was first described in 1963 for an occurrence in the Wodgina pegmatite, Wodgina, Pilbara Region, Western Australia.

Typical occurrence is in zoned pegmatites in amphibolite. It is associated with tantalite, albite, quartz, muscovite, tapiolite, microlite and microcline.

It occurs in pegmatites in a wide variety of locations. The most studied is the Tanco pegmatite in Manitoba, Canada; also in Red Lake, Ontario. It is reported from the Strickland quarry, Portland, Middlesex County, Connecticut; the Herbb #2 pegmatite, Powhatan County, Virginia; the McAllister mine, Rockford, Coosa County, Alabama; the Peerless mine, Pennington County, South Dakota. Also from Paraíba and Minas Gerais, Brazil; Krasonice, Czech Republic; Orivesi, Finland; Kalba, eastern Kazakhstan; Ankole, Uganda; Miami district, Zimbabwe and Karibib and Kohero, Namibia.