Citation: Peterson, R. C. (1983). The structure of hackmanite, a variety of sodalite, from Mont St-Hilaire, Quebec. The Canadian Mineralogist, 21, pp. 549-552.
Formula: Al3 Cl Fe0.04 Na3.76 O12 Si3
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al6 Fe8 Na8 O24 Si6 (Al3 Fe4 Na4 O12 Si3)
Multiplicity: 1
Coordination sequences: