Citation: Chon Chulmin; Kim Shin Ae; Moon Hi-Soo (2003). Crystal structures of biotite at high temperatures and of heat-treated biotite using neutron powder diffraction. Clays and Clay Minerals (29,1981-), 51, pp. 519-528.
Formula: Al1.92 F1.98 Fe2.59 H1.47 K2 Mg3.15 Mn0.09 O21.47 Si5.98 Ti0.27
Chemical name: K2 (Mg3.15 Fe2.59 Ti0.17 Mn0.09) (Si5.98 Al1.92 Ti0.10) O20 ((O H)1.47 F1.98)
List type: noninterleaving
List: 2D
Basis: (1;0;0 0;1;0)
Dimensionality: 2
Formula: Al8 F4 Fe6 H4 Mg6 Mn6 O24 Si8 Ti14 (Al4 F2 Fe3 H2 Mg3 Mn3 O12 Si4 Ti7)
Multiplicity: 1