Tags: Chemical Substance, Mineral.
The ferrierite group of zeolite minerals (the FER structure) consists of three very similar species: ferrierite-Mg ferrierite-Na and ferrierite-K based on the dominant cation in the A location. Ferrierites are orthorhombic minerals with highly variable cationic composition (NaK)2Mg(SiAl)18O36(OH)·9H2O. Calcium and other ions are often also present.
