Citation: Giuseppetti, G.; Mazzi, F.; Tadini, C. (1991). The crystal structure of monoclinic langbanite: (Mn,Ca,Fe,Mg)2+4(Mn,Fe)3+9Sb5+[O16(SiO4)2]. Neues Jahrbuch fur Mineralogie, Monatshefte, 1991, pp. 193-211.
Formula: Ca0.79 Fe6.09 Mg0.14 Mn31.98 O72 Sb3 Si6
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Ca10 Fe60 Mg8 Mn78 O144 Sb6 Si12 (Ca5 Fe30 Mg4 Mn39 O72 Sb3 Si6)
Multiplicity: 1