AM_Erionite-Ca Formula: (Si14.34 Al3.66) Ca2 K O50.85 H54.096 Name: Erionite-Ca Unit cell: 13.339 13.339 15.112 90.0 90.0 120.0 , V=2328.62 Space group: P63/MMC (194)

Gualtieri A , Artioli G , Passaglia E , Bigi S , Viani A , Hanson J C , American Mineralogist , 83 (1998) p.590-606, Crystal structure-crystal chemistry relationships in the zeolites erionite, and offretite, Sample from Lady Hill