Franklinfurnaceite
Franklinfurnaceite is an IMA-recognized mineral species in the silicate class, with the chemical formula Ca₂Mn²⁺₃Mn³⁺Fe³⁺Zn₂Si₂O₁₀(OH)₈.
It crystallizes in the monoclinic crystal system (space group C2).
Key properties: Mohs hardness 3; specific gravity 3.66; Brown streak; Vitreous luster; optically biaxial.
IMA symbol Fkf, IMA status: approved, named in 1986.
A late-stage mineral in vugs in a metamorphosed stratiform zinc deposit.
It is found associated with Willemite, clinohedrite, hodgkinsonite, hetaerolite, franklinite, barite, rhodonite.
The name commemorates Franklin Furnace, the former name for Franklin, New Jersey, USA.
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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