Ferrisymplesite
Ferrisymplesite is an IMA-recognized mineral species in the arsenate class, with the chemical formula Fe³⁺₃(AsO₄)₂(OH)₃·5H₂O.
It is a member of the Symplesite structural group.
Key properties: specific gravity 2.885; Resinous luster.
IMA symbol Fsym, IMA status: questionable, named in 1924.
Found in the oxidized zone of a Co–Ni sulfide deposit (Hudson Bay mine, Canada); in the oxidized zone of a polymetallic hydrothermal ore deposit (Neubulach, Germany).
It is found associated with Erythrite–annabergite (Hudson Bay mine, Canada); copper, malachite (Neubulach, Germany).
The name refers to its ferric iron content and supposed relation to symplesite.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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