Citation: Armbruster, T.; Czank, M. (1992). H2O ordering and superstructures in armenite, BaCa2Al6Si9O30.2H2O: A single-crystal X-ray and TEM study sample from Remigny, Quebec, Canada. American Mineralogist, 77, pp. 422-430.
Formula: Al6 Ba Ca2 H2 O32 Si9
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al44 O120 Si56 (Al11 O30 Si14)
Multiplicity: 1