Franklinphilite
A rare stilpnomelane-group phyllosilicate known essentially from Franklin, New Jersey and one confirmed Welsh locality.
Intro adapted from Wikipedia (CC BY-SA).
Franklinphilite is an IMA-recognized mineral species in the silicate class, with the chemical formula (K,Na)₄(Mn²⁺,Mg,Zn)₄₈(Si,Al)₇₂(O,OH)₂₁₆·6H₂O.
It crystallizes in the triclinic crystal system. It is a member of the Stilpnomelane structural group.
IMA symbol Fkp, IMA status: approved, named in 1990.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data and a Wikipedia introduction — a full written entry hasn’t been published yet.
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