Tschermigite
A variety of Minerals
What is 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.
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Tschermigite Localities Map
See where Tschermigite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Map preview
North ZoneCentral RidgeSouth Basin
Quick Facts
Physical Properties
- Color
- Colourless, white; colourless in transmitted light
- Hardness (Mohs)
- 1.5 - 2
- Density
- 1.641 g/cm³
Chemical Properties
- Chemical Formula
- (NH4)Al(SO4)2 · 12H2O
- Elements
- Al, H, N, O, S
Also Known As
TschermigiteAmmonia Alum
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