| 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 |
| IMA symbol | Fcor[1] |
| 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 |
| Luster | 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]
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