AM_Epistilbite_5
Formula: Ca1.296 Na.53 K.05 (Al3.144 Si8.856) O31.87 H13.62
Name: Epistilbite
Unit cell: 9.08 17.74 10.25 90.0 124.54 90.0 , V=1360.03
Space group: C12/M1 (12)

Perrotta A J , Mineralogical Magazine , 36 (1967) p.480-490, The crystal structure of epistilbite, Locality: Teigarhorn, Iceland