Na Feldspar - Sodium Feldspar: Chemical Analysis SiO2 : 67 -69 % Al2O3 : 17 -19 % Na2O : 7.00 11.00 % K2O : 0.2 0.5 % CaO : 0.02 % MgO : 0.10 % MnO : 0.001 % L.O.I .: 0.06 0.2 % Colou r: White Particle Size : 200 Mesh, 250 Mesh & grains ( or as per customers requirements) Packing : Standard 50 Kg. HDPE / PP Bags and Jumbo Bags or as per customers requirements)