AM_Clinoptilolite-Ca_3 Formula: Na.66 Ca.86 K.64 Mg.26 Si18 O49.42 H20.423 Name: Clinoptilolite-Ca Unit cell: 17.675 17.9572 7.4091 90.0 116.304 90.0 , V=2108.10 Space group: C12/M1 (12)

Cappelletti P , Langella A , Cruciani G , European Journal of Mineralogy , 11 (1999) p.1051-1060, Crystal-chemistry and synchrotron Rietveld refinement, of two different clinoptilolites from volcanoclastites, of North-Western Sardinia, Sample: LAC1, Locality: volcanoclastites of North-Western Sardinia