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Silicate

Ferriperbøeite-(Ce)

(CaCe₃)(Fe³⁺Al₂Fe²⁺)(Si₂O₇)(SiO₄)₃O(OH)₂
Hardness6–7
Crystal systemMonoclinic
ClassSilicate
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Ferriperbøeite-(Ce)

Ferriperbøeite-(Ce) is an IMA-recognized mineral species in the silicate class, with the chemical formula (CaCe₃)(Fe³⁺Al₂Fe²⁺)(Si₂O₇)(SiO₄)₃O(OH)₂.

It crystallizes in the monoclinic crystal system (space group P2_1/m). It is a member of the Gatelite structural group.

Key properties: Mohs hardness 6–7; specific gravity 4.61; Brown streak; Vitreous luster; optically biaxial.

IMA symbol Fpbø-Ce, IMA status: approved, named in 2017.

Found in crystal aggregates, largely replacing cerite-(Ce), in a Fe-Cu-REE skarn deposit.

It is found associated with Cerite-(Ce), törnebohmite-(Ce), ferriallanite-(Ce) (Nya Bastnäs); biraite-(Ce), Mg-analogue to biraite-(Ce), ferriallanite-(Ce), monazite-(Ce), winchite.

By analogy to IMA nomenclature for the epidote supergroup, it recognizes a member of the epidote-törnebohmite polysomatic series and emphasizes the relationship with perbøeite-(Ce).

Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet. Browse more F minerals or help write this entry.