AM_Natrolite_11 Formula: Na2 Al2 Si3 O12 H4 Name: Natrolite Unit cell: 18.367 18.583 6.599 90.0 90.0 90.0 , V=2252.33 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 III