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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
CategoryMineral
Formula
(repeating unit)
Pb(Mn4+6Fe3+2)O16
IMA symbolFcor[1]
Strunz classification4.DK.4.DK
Crystal systemTetragonal
Space groupI4/m
Unit cella = 9.9043 Å, c = 2.8986 Å Z=1
Identification
Colourblack
Fractureuneven
Tenacitybrittle
Lustersub-metallic
DiaphaneityOpaque
Specific gravity5.538
Common impuritiesBa2+,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

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  1. ^ 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.
  2. ^ Chukanov, Nikita V.; Aksenov, Sergey M.; Jančev, Simeon; Pekov, Igor V.; Göttlicher, Jörg; Polekhovsky, Yury S.; Rusakov, Vyacheslav S.; Nelyubina, Yuliya V.; Van, Konstantin V. (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. Bibcode:2016PCM....43..503C. doi:10.1007/s00269-016-0811-z. S2CID 102008890.