Citation: de Villiers, J.P.R. (1980). The crystal structure of Braunite II and its relation to Bixbyite and Braunite. American Mineralogist, 65, pp. 756-765.
Formula: Ca Fe2.38 Mn11.62 O24 Si
Chemical name: Ca Mn11.62 Fe2.38 Si O24
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Fe112 Mn112 O192 Si8 (Fe14 Mn14 O24 Si)
Multiplicity: 1