Flamite
Flamite is an IMA-recognized mineral species in the silicate class, with the chemical formula Ca₈₋ₓ(Na,K)ₓ(SiO₄)₄₋ₓ(PO₄)ₓ.
It crystallizes in the hexagonal crystal system (space group P6_3).
Key properties: Mohs hardness 5–5.5; specific gravity 3.264; White streak; Vitreous luster; optically uniaxial.
IMA symbol Fmt, IMA status: approved, named in 2013.
Found in Ca- and Al-rich paralava, an ultrahigh-temperature combustion metamorphic rock.
It is found associated with Larnite (partially hydrated), gehlenite, rankinite, Ti-rich andradite, ferrian perovskite, magnesioferrite, hematite, ettringite.
Derived from “flame”, in allusion to the origin of the mineral by ultrahigh-temperature metamorphism from the natural combustion of fossil fuel.
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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