AM_Sillimanite_14 Formula: Al2 Si O5 Name: Sillimanite Unit cell: 7.4537 7.6238 5.756 90.0 90.0 90.0 , V=327.09 Space group: PBNM (62)

Yang H , Hazen R M , Finger L W , Prewitt C T , Downs R T , Physics and Chemistry of Minerals , 25 (1997) p.39-47, Compressibility and crystal structure of sillimanite, Al2SiO5, at high pressure, Sample: P = 2.54 GPa