Ferrierite-K
The potassium-dominant member of the ferrierite zeolite group — one of four species differing only in their dominant cation.
Intro adapted from Wikipedia (CC BY-SA).
Ferrierite-K is an IMA-recognized mineral species in the silicate class, with the chemical formula (K,Na)₅(Si₃₁Al₅)O₇₂·18H₂O.
It crystallizes in the orthorhombic crystal system (space group Immm). It is a member of the Ferrierite structural group.
IMA symbol Frr-K, IMA status: approved, named in 1997.
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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