Citation: Redhammer, G\"unther J.; Roth, Georg; Topa, Dan; Amthauer, Georg (2008). Synthetic aenigmatite analog Na~2~(Mn~5.26~Na~0.74~)Ge~6~O~20~: structure and crystal chemical considerations. Acta Crystallographica Section C, 64, pp. i21-i26.
Formula: Ge6 Mn5.26 Na2.74 O20
Chemical name: Disodium hexamanganese(II,III) germanate
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Ge12 Mn12 Na2 O40 (Ge6 Mn6 Na O20)
Multiplicity: 1
Coordination sequences: