Citation: Brigatti, M. F.; Galli, E.; Poppi, L. (1991). Effect of Ti substitution in biotite-M crystal chemistry Sample 9 from a lamproite rock, Cancarix, Spain. American Mineralogist, 76, pp. 1174-1183.
Formula: Al1.092 Ca0.006 Cr0.024 Fe0.282 K0.952 Mg2.424 Mn0.015 Na0.024 O12 Si2.908 Ti0.177
List type: noninterleaving
List: 2D
Basis: (1;0;0 0;1;0)
Dimensionality: 2
Formula: Al8 Cr6 Fe6 Mg6 Mn6 O24 Si8 Ti6 (Al4 Cr3 Fe3 Mg3 Mn3 O12 Si4 Ti3)
Multiplicity: 1