Sillimanite Flour Typical Chemical Analysis Content % Standard Typical Al2O3 min 57 58 TiO2 max 2.0 1.2 Fe 2 O 3 max 0.8 0.7 CaO max 0.2 0.1 MgO max 0.4 0.2 Na2O + K2O max 01 0.1 Th + U max 25 ppm 25 ppm Moisture max 0.5 0.1 Typical Physical Properties Appearance Dry Powder of Limore...