Plavnoite is a rare complex uranium sulfate mineral with the formula K0.8Mn0.6[(UO2)2O2(SO4)]•3.5H2O. Typically for the secondary uranium mineral, plavnoite contains uranyl groups. It was discovered in the Plavno mine in Jáchymov, Czech Republic.[2][3] The Jáchymov site is known as a type locality for many rare and unique minerals.[4]
| Plavnoite | |
|---|---|
| General | |
| Category | Sulfate |
| Formula (repeating unit) | K0.8Mn0.6[(UO2)2O2(SO4)]•3.5H2O |
| IMA symbol | Pvn[1] |
| Crystal system | Monoclinic |
| Crystal class | Prismatic (2/m) (same H-M symbol) |
| Space group | C2/m |
| Unit cell | a = 8.63, b = 14.28, c = 8.86 [Å], β = 104.04° (approximated) |
| Identification | |
| Other characteristics |  Radioactive |
| References | [2] |
Relation to other minerals
editAlthough related to zippeite,[2] plavnoite is chemically unique.[5]
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 Plášil, J., Škácha, P., Škoda, R., Kampf, A.R., Sejkora, J., Čejka, J., Hloušek, J., Kasatkin, A.V., Pavlíček, R., and Babka, K., 2015. Plavnoite, IMA 2015-059. CNMNC Newsletter No. 27, October 2015, 1229; Mineralogical Magazine 79, 1229–1236
- ^ "Plavnoite: Plavnoite mineral information and data". Mindat.org. Retrieved 2016-03-13.
- ^ "Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic - Mindat.org". Mindat.org. Retrieved 2016-03-13.
- ^ "Plavnoite: Plavnoite mineral information and data". Mindat.org. Retrieved 2016-03-13.