Citation: Wenk, H. R. (1974). Howieite, a new type of chain silicate. American Mineralogist, 59, pp. 86-97.
Formula: Al0.62 Fe8 Mg0.45 Mn2.98 Na O44 Si11.92 Ti0.08
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al4 Fe8 Mg2 Mn4 O44 Si12 Ti2 (Al2 Fe4 Mg Mn2 O22 Si6 Ti)
Multiplicity: 1