AM_Brookite_3 Formula: Ti O2 Name: Brookite Unit cell: 9.211 5.472 5.171 90.0 90.0 90.0 , V=260.63 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 temperatures, Sample at 625 degrees C