Citation: Armbruster, T. (1986). Role of Na in the structure of low-cordierite: A single crystal X-ray study. American Mineralogist, 71, pp. 746-757.
Formula: Al4 Fe0.58 H1.7 Li0.36 Mg1.06 Na0.36 O18.85 Si5
Chemical name: Na.36 (Mg1.06 Fe.58 Li.36) Al4 Si5 O18 (H2 O).85
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al16 Fe8 Li8 Mg8 O72 Si20 (Al4 Fe2 Li2 Mg2 O18 Si5)
Multiplicity: 1
Coordination sequences: