Citation: Artioli, G.; Galli, E. (1999). Gonnardite: Re-examination of holotype material, and discreditation of tetranatrolite. American Mineralogist, 84, pp. 1445-1450.
Formula: Al2.15 Ca0.46 Na1.16 O13.4 Si2.85
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al20 O40 Si20 (Al O2 Si)
Multiplicity: 1