AM_Kyanite
Formula: Al2 Si O5
Name: Kyanite
Unit cell: 7.1262 7.852 5.5724 89.99 101.11 106.03 , V=293.60
Space group: P-1 (2)

Winter J K , Ghose S , American Mineralogist , 64 (1979) p.573-586, Thermal expansion and high-temperature crystal chemistry of the Al2SiO5, polymorphs, T = 25 deg C