Chlormanganokalite
Chlormanganokalite is an IMA-recognized mineral species in the halide class, with the chemical formula K₄MnCl₆.
It crystallizes in the hexagonal crystal system (space group R-3c). It is a member of the Rinneite structural group.
Key properties: Mohs hardness 2.5; specific gravity 2.31; Vitreous luster; optically uniaxial.
IMA symbol Cmk, grandfathered status — known before the IMA’s founding, named in 1906.
Found in cavities in ejected scoria.
It is found associated with Halite, sylvite, hematite.
The name refers to CHLORine, MANGANese, and potassium (KALium), in its composition.
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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