Chemistry:Ferricoronadite
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| Ferricoronadite | |
|---|---|
 Greyish brown crystals of the very rare Pb-Mn mineral ferricoronadite (IMA 2015-093) from one of the only two known localities worldwide: Cowshill, Weardale, County Durham, United Kingdom . | |
| General | |
| Category | Mineral |
| Formula (repeating unit) | Pb(Mn4+6Fe3+2)O16 |
| Strunz classification | 4.DK.4.DK |
| Crystal system | Tetragonal |
| Space group | I4/m |
| Unit cell | a = 9.9043 Å, c = 2.8986 Å Z=1 |
| Identification | |
| Colour | black |
| Fracture | uneven |
| Tenacity | brittle |
| |re|er}} | sub-metallic |
| Diaphaneity | Opaque |
| Specific gravity | 5.538 |
| Common impurities | Ba2+,Mn3+,Ti,Al3+ |
Ferricoronadite is a lead mineral discovered in 2016 by Chukanov et al. near Nezhilovo, North Macedonia. Its simplified elemental formula is Pb(Mn64+Fe23+)O16, and it is found in a matrix of zinc-dominant spinels. Ferricoronadite is named as an analogue of coronadite.[2]
References
- ↑ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine 85 (3): 291–320. doi:10.1180/mgm.2021.43. Bibcode: 2021MinM...85..291W.
- ↑ Chukanov, Nikita V.; Aksenov, Sergey M.; Jančev, Simeon; Pekov, Igor V.; Göttlicher, Jörg; Polekhovsky, Yury S.; Rusakov, Vyacheslav S.; Nelyubina, Yuliya V. et al. (2016). "A new mineral species ferricoronadite, Pb[Mn6 4+(Fe3+, Mn3+)2]O16: Mineralogical characterization, crystal chemistry and physical properties". Physics and Chemistry of Minerals 43 (7): 503–514. doi:10.1007/s00269-016-0811-z. Bibcode: 2016PCM....43..503C.
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