Potassiccarpholite
Potassiccarpholite is an IMA-recognized mineral species in the silicate class, with the chemical formula K(Mn²⁺,Li)₂Al₄Si₄O₁₂(OH,F)₈.
It crystallizes in the orthorhombic crystal system (space group Ccca). It is a member of the Carpholite structural group.
Key properties: Mohs hardness 5; specific gravity 3.08; White streak; Silky luster; optically biaxial.
IMA symbol Pcar, IMA status: approved, named in 2002.
Lining miarolitic cavities in microcline in granite.
It is found associated with Quartz, albite, beryl, topaz, bertrandite, hellandite, zinnwaldite, fluorite, hematite, apatite.
The name refers to the dominant potassium in the composition and relationship to carpholite.
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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