Specification of feldspar sodium: Properties Properties Sodium-02 Silica Sio2 70% (+/- 2%) Alumina Al2o3 18% (+/- 2%) Sodium oxide Na2o 9% (+/- 1%) Pottasium oxide K2o 1% (+/- 1%) Titanium oxide Tio2 Nil Calcium oxide Cao 0.25% (+/- 0.05%) Magnesium oxide Mgo 0.25% (+/- 0.05%) Ferric oxide Fe2o3 0.4% Loss on ignition Loi 0.2% 25 kg. Hdep bags 50 kg. Hdep bags 1 mt jumbo bags