AM_Levyne-Ca_7 Formula: Ca2.759 Na.677 K.215 (Si11.7 Al6.3) O51.24 H48 Name: Levyne-Ca Unit cell: 13.338 13.338 23.014 90.0 90.0 120.0 , V=3545.72 Space group: R-3M (166)

Merlino S , Galli E , Alberti A , Tschermaks Mineralogische und Petrographische Mitteilungen , 22 (1975) p.117-129, The crystal structure of levyne, Note: a zeolite mineral, Locality: small cavity in andesite from Nurri, Nuoro, Sardinia