Wodginite | |
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![]() Wodginite over cassiterite | |
General | |
Category | Oxide - Tantalate mineral |
Formula (repeating unit) | Mn2+(Sn,Ta)Ta2O8 |
IMA symbol | Wdg[1] |
Strunz classification | 4.DB.40 |
Dana classification | 08.01.08.01 |
Crystal system | Monoclinic |
Crystal class | Prismatic (2/m) (same H-M symbol) |
Space group | C2/c (no. 15) |
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 | [2][3][4][5] |
Wodginite is a manganese, tin, tantalum oxide mineral with the chemical formula Mn2+(Sn,Ta)Ta2O8. It may also include significant amounts of niobium.[2][3]
Background
[edit]Wodginite was first described in 1963 for an occurrence in the Wodgina pegmatite, Wodgina, Pilbara Region, Western Australia.[4]
Typical occurrence of wodginite occurs in zoned pegmatites in amphibolite. It is associated with tantalite, albite, quartz, muscovite, tapiolite, microlite and microcline.[2]
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.[2][4]
![](https://upload.wikimedia.org/wikipedia/commons/thumb/7/7b/Ixiolite_columbite_group_%28tantalite%29_wodginite_crystal_superstructure.svg/220px-Ixiolite_columbite_group_%28tantalite%29_wodginite_crystal_superstructure.svg.png)
References
[edit]- ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
- ^ a b c d Handbook of Mineralogy
- ^ a b Webmineral data
- ^ a b c Mindat.org
- ^ Ercit, T.S.; Hawthorne, F.C.; Cerny, P. (1992). "The wodginite group. I. Structural crystallography". The Canadian Mineralogist. 30: 597–611. Retrieved 31 December 2020.
- ^ Ercit, T. S.; Hawthorne, F.; Cerny, P. (1992). "The wodginite group: I. structural crystallography". Canadian Mineralogist. 30: 597–611.
- Nickel, E H; Rowland, J F; McAdam, R C (1963). "Wodginite - A new tin-manganese tantalate from Wodgina, Australia and Bernic lake, Manitoba" (PDF). The Canadian Mineralogist. 7: 390–402.