AM_Clinoptilolite-Na_4 Formula: Na1.2 Ca.88 K.26 (Al4.08 Si13.92) O37.86 H1.86 Name: Clinoptilolite-Na Unit cell: 17.0 16.66 7.35 90.0 116.44 90.0 , V=1863.93 Space group: C12/M1 (12)

Armbruster T , Gunter M E , American Mineralogist , 76 (1991) p.1872-1883, Stepwise dehydration of heulandite-clinoptilolite from Succor Creek, Oregon,, U.S.A.: A single-crystal X-ray study at 100K, sample name: dehyd4