AM_Paranatrolite_5 Formula: Na1.95 K.229 (Si2.75 Al2.25) O13.021 H6.04 Name: Paranatrolite Unit cell: 18.971 19.204 6.5952 90.0 91.601 90.0 , V=2401.82 Space group: F1D1 (9)

Seryotkin Y V , Bakakin V V , Belitsky I A , European Journal of Mineralogy , 16 (2004) p.545-550, The crystal structure of paranatrolite