Wodginite

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Wodginite
General
CategoryOxide - Tantalate mineral
Chemical formulaMn2+(Sn,Ta)Ta2O8
Strunz classification04.DB.40
Dana classification08.01.08.01
Identification
ColorReddish brown, dark brown to black
Crystal habitFlattened dipyramidal to prismatic crystals in radiating groups; granular, massive.
Crystal systemMonoclinic - Prismatic H-M Symbol (2/m)
TwinningVery common as penetration twins
Cleavagenone
FractureIrregular
TenacityBrittle
Mohs scale hardness5.5
LusterSub-metallic
StreakBrown
DiaphaneityOpaque, translucent in thin fragments
Specific gravity7.19–7.36
References[1][2][3]
 
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Wodginite
General
CategoryOxide - Tantalate mineral
Chemical formulaMn2+(Sn,Ta)Ta2O8
Strunz classification04.DB.40
Dana classification08.01.08.01
Identification
ColorReddish brown, dark brown to black
Crystal habitFlattened dipyramidal to prismatic crystals in radiating groups; granular, massive.
Crystal systemMonoclinic - Prismatic H-M Symbol (2/m)
TwinningVery common as penetration twins
Cleavagenone
FractureIrregular
TenacityBrittle
Mohs scale hardness5.5
LusterSub-metallic
StreakBrown
DiaphaneityOpaque, translucent in thin fragments
Specific gravity7.19–7.36
References[1][2][3]

Wodginite is a manganese, tin, tantalum oxide mineral with formula Mn2+(Sn,Ta)Ta2O8. It may include significant niobium.[1][2]

Wodginite was firsr described in 1963 for an occurrence in the Wodgina pegmatite, Wodgina, Pilbara Region, Western Australia.[3]

Typical occurrence is in zoned pegmatites in amphibolite. It is associated with tantalite, albite, quartz, muscovite, tapiolite, microlite and microcline.[1]

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.[1][3]

References