AM_Brookite_2 Formula: Ti O2 Name: Brookite Unit cell: 9.191 5.463 5.157 90.0 90.0 90.0 , V=258.94 Space group: PBCA (61)

Meagher E P , Lager G A , The Canadian Mineralogist , 17 (1979) p.77-85, Polyhedral thermal expansion in the TiO2 polymorphs: Refinement, of the crystal structures of rutile and brookite at high temperature, Sample at 425 degrees C