AM_Natrolite_10 Formula: Na2 Al2 Si3 O12 H4 Name: Natrolite Unit cell: 18.372 18.576 6.606 90.0 90.0 90.0 , V=2254.48 Space group: FDD2 (43)

Krogh Andersen E , Krogh Andersen I G , Ploug-Sorensen G , European Journal of Mineralogy , 2 (1990) p.799-807, Disorder in natrolites: structure determinations of three disordered natrolites and, one lithium-exchanged disordered natrolite, Example: Na II