Ferriperbøeite-(Ce)

ferriperboeite-(Ce)

ferriallanite-(Ce)

cerite-(Ce)

tornebohmite-(Ce)

Images

Formula: (CaCe₃)(Fe³⁺Al₂Fe²⁺)(Si₂O₇)(SiO₄)₃O(OH)₂
Valence: (CaCe³⁺₃)(Fe³⁺Al₂Fe²⁺)(Si₂O₇)(SiO₄)₃O(OH)₂
Sorosilicate (Si₂O₇ groups), gatelite group, gatelite supergroup, cerium-bearing mineral
Crystal System: Monoclinic
Specific gravity: 4.634 calculated
Hardness: 6 to 7
Streak: Brown
Colour: Brownish black
Environments

Carbonatites
Metamorphic environments

Localities

At the Ren carbonatite sill, Monashee Mountain, Vernon Mining Division, British Columbia, Canada, ferriperbøeite-(Ce) is associated with biraite-(Ce), a Mg-analogue of biraite-(Ce), ferriallanite-(Ce), monazite-(Ce), winchite, dolomite, calcite and baryte (HOM).

At the type locality, the Nya Bastnäs deposit, Bastnäs Mines, Riddarhyttan, Skinnskatteberg, Västmanland County, Sweden, ferriperbøeite-(Ce) occurs in the Fe–Cu–REE skarn deposit, in direct contact with ferriallanite-(Ce), cerite-(CeCa) and törnebohmite-(Ce). In the type specimen, ferriperbøeite-(Ce) forms brownish black irregular to short-prismatic crystals up to about 500 µm in size (EJM 30.3.537-544).

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