| Wodginite | |
|---|---|
 Wodginite over cassiterite | |
| General | |
| Category | Oxide - Tantalate mineral |
| Formula | Mn2+(Sn,Ta)Ta2O8 |
| IMA symbol | Wdg1 |
| 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 | 2345 |
Wodginite is a manganese, tin, tantalum oxide mineral with the chemical formula Mn2+(Sn,Ta)Ta2O8. It may also include significant amounts of niobium.23
Background
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.24
References
References
- 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.
- Handbook of Mineralogy
- Webmineral data
- 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.