AM_Clinoptilolite-Na Formula: Na4 Ca1.82 K.4 Mg.04 (Al4.08 Si13.92) O48.76 H12.76 Name: Clinoptilolite-Na Unit cell: 17.64 17.94 7.405 90.0 116.53 90.0 , V=2096.64 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 100 K, sample name: natural