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Gismondine

From Wikipedia, the free encyclopedia
Gismondine
Gismondine, Campo de Calatrava, Ciudad Real, Spain
General
CategoryTectosilicate minerals
GroupZeolite group
FormulaCaAl2Si2O8·4H2O
Dana classification77.1.3.1
Crystal systemMonoclinic
Crystal classPrismatic (2/m)
(same H-M symbol)
Space groupP21/n

Gismondine is a mineral with the chemical formula CaAl2Si2O8·4H2O. It is a zeolite or hydrated aluminosilicate. It forms colorless, bipyramidal crystals of orthorhombic symmetry.

Gismondine was named for Italian mineralogist Carlo Giuseppe Gismondi (1762–1824). It has been found in Iceland, Ireland, and Italy.

References

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