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Formula: (Mg,Na,K,Ca)2(Si,Al)12O24.15H2O
Hydrated tectosilicate (framework silicate), faujasite subgroup,
zeolite group
Crystal system: Isometric
Hardness: 5
Environments
Volcanic igneous environments
Hydrothermal environments
Approved as a new mineral species in 1997 by a special procedure of the IMA. To date (June 2026) reported only from
the type locality.
Localities
The type locality is the Limberg Quarries, Sasbach am Kaiserstuhl, Emmendingen, Freiburg Region, Baden-Württemberg,
Germany. For this species Mg is the most abundant extra-framework cation. The proposed type (and only) example
is an old museum sample from the Genth Collection at Pennsylvania State University, that originated at Sasbach am
Kaiserstuhl
(CM 35.6.1582).
Faujasite-Mg from the Limberg Quarries -
Image
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