Citation: Gualtieri, A.; Artioli, G.; Passaglia, E.; Bigi, S.; Viani, A.; Hanson, J. C. (1998). Crystal structure-crystal chemistry relationships in the zeolites erionite and offretite Sample #2 from Fitta. American Mineralogist, 83, pp. 590-606.
Formula: Al5.4 Ca1.5 H4.166 K0.89 Mg0.86 O52.07 Si12.6
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al18 O36 Si18 (Al O2 Si)
Multiplicity: 1