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Ferroberaunite from

Locality type:	Mine
Classification
Species:	Ferroberaunite
Formula:	Fe2+Fe53+(PO4)4(OH)5 · 6H2O
Comments:	Beraunite was originally defined as a fully oxidised mineral, but was redefined by Fanfani and Zanazzi (1967), on the basis of a crystal structural analysis, as a mixed-valence iron phosphate and they left the original fully oxidized end-member unnamed. In essence, Fanfani and Zanazzi (1967) had discovered a new mineral species (ferroberaunite) but re-used a previous name. In the 19th century, both beraunite and eleonorite had been applied to the fully oxidized mineral. Eleonorite had been re-applied by the IMA to the oxidized end-member of the beraunite-eleonorite series. In the IMA 21-D redefinition the name beraunite was reapplied to the oxidised phase and the name ferroberaunite was created for the mixed-valence phase (Tvrdy et al., 2021).
Confirmation
Validity:	Believed Valid
Data
Mineral Data:	Click here to view Ferroberaunite data
Locality Data:	Click here to view Ojuela Mine, Mapimí, Mapimí Municipality, Durango, Mexico
Data Identifiers
Mindat Occurrence Record ID:	1470486
Long-form Identifier:	1:3:1470486:6
GUID (UUID V4):	573aced6-d82b-48dc-9618-0940eef552c5
References