AM_Clinoptilolite-Ca_2 Formula: (Si14.52 Al3.48) O39.36 Na.56 Ca.444 Ba.16 K.84 H3.36 Name: Clinoptilolite-Ca Unit cell: 17.588 17.572 7.389 90.0 116.77 90.0 , V=2038.86 Space group: C12/M1 (12)

Armbruster T , American Mineralogist , 78 (1993) p.260-264, Dehydration mechanism of clinoptilolite and heulandite: Single-crystal X-ray, study of Na-poor, Ca-, K-, Mg-rich clinoptilolite at 100 K, Sample Dehyd 1, Data obtained from the ICSD