Category Sulfate mineral Strunz classification 7.CC.20 Space group Pa3m3 | Formula
(repeating unit) NH4Al(SO4)2·12(H2O) Crystal system Isometric | |
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Crystal class Diploidal (m3)
H-M symbol: (2/m 3) | ||
Tschermigite
Tschermigite is a mineral form of ammonium alum, formula NH4Al(SO4)2·12(H2O). It is found in burning coal seams, bituminous shale and fumaroles. Because of its extreme water solubility it is unlikely to persist except in the dryest of conditions. Discovered in 1852 at Cermiky, also known as Tschermig in Bohemia. It is colorless and named for where it was discovered.
Contents
Tschermigite meaning
References
Tschermigite Wikipedia(Text) CC BY-SA