Citation: Haring, M. M. M.; McDonald, A. M. (2014). Steedeite, NaMn2[Si3BO9](OH)2: characterization, crystal-structure determination, and origin. The Canadian Mineralogist, 52, pp. 47-60.
Formula: B Fe0.1 H2 Mn1.9 Na O11 Si3
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: B2 Fe4 H4 Mn4 O22 Si6 (B Fe2 H2 Mn2 O11 Si3)
Multiplicity: 1