Citation: Bigi, S.; Brigatti, M. F. (1994). Crystal chemistry and microstructures of plutonic biotite Sample 2M1 from Valle del Cervo syenitic complex. American Mineralogist, 79, pp. 63-72.
Formula: Al1.216 Fe1.215 K0.946 Mg1.545 Mn0.018 Na0.032 O12 Si2.784 Ti0.225
List type: interleaving
List: 2D
Basis: (1;0;0 0;1;0)
Dimensionality: 2
Formula: Al8 Fe6 Mg6 Mn6 O24 Si8 Ti6 (Al4 Fe3 Mg3 Mn3 O12 Si4 Ti3)
Multiplicity: 1