Wiklundite
Wiklundite is a rare[3] and complex arsenite-silicate mineral with the chemical formula Pb2(Mn2+,Zn)3(Fe3+,Mn2+)2(Mn2+,Mg)19(As3+O3)2(Si,As5+O4)6(OH)18Cl6. The mineral characterizes in a large c unit cell parameter.[2] It was found in Långban, Sweden - a home for many rare and exotic minerals.[4]
| Wiklundite | |
|---|---|
| General | |
| Category | Silicate |
| Formula (repeating unit) | Pb2(Mn2+,Zn)3(Fe3+,Mn2+)2(Mn2+,Mg)19(As3+O3)2(Si,As5+O4)6(OH)18Cl6 |
| IMA symbol | Wik[1] |
| Crystal system | Trigonal |
| Crystal class | Hexagonal scalenohedral (3m) H-M symbol: (3 2/m) |
| Space group | R3c |
| Unit cell | a = 8.26, c = 126.59 [Å] (approximated) |
| Identification | |
| References | [2] |
Relation to other minerals
Structure of wiklundite is unique.[2] A slightly chemically similar mineral, although lacking manganese and iron, is hereroite.[5]
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.
- Cooper, M.A., Hawthorne, F.C., Langhof, J., Hålenius, U., and Holtstam, D., 2015. Wiklundite, IMA 2015-057. CNMNC Newsletter No. 27, October 2015, 1227; Mineralogical Magazine 79, 1229–1236
- "Wiklundite: Wiklundite mineral information and data". Mindat.org. Retrieved 2016-03-13.
- "Långban, Filipstad, Värmland, Sweden - Mindat.org". Mindat.org. Retrieved 2016-03-13.
- "Hereroite: Hereroite mineral information and data". Mindat.org. Retrieved 2016-03-13.
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