Tianfeng Potassium (k) Feldspar Co., Ltd. is a Potassium feldspar powder, Quartz powder and lilithium feldspar powder manufacturer, We can offer you the best price and the best quanlity. Details: 1) Place of Origin: China 2) Color: White, powder 3) Chemical composition: A) Potassic feldspar: K2O: 7% to 12.5%; SiO2: 67% to 68%; Al2O3 more than 16.5%; Fe2O3 less than 0.15% or 0.1% or 0. 05% TiO: <0.1% B) Lithia feldspar: Li2O: 0.8-1.4%K2O: 1.8-2.2%Na2O: 4.5-4.8%AL2O3: 15-16.5%SiO2: 69-72%Fe2O3: Max 0.1%Rb2O: 0.25+%CS2O : 0.048%C): Sodium feldspar: SiO2: 67-69% AL2O3: 17.5-20% Fe2O3: Max 0.1% Ti2O: 0.01-0.08% CaO : 0.04% MgO : 0.08% K2O: 0.1-0.3% Na2O: 7.5-10.5% D): Quartz (Silica powder): SiO2: 99+/-0.5% AL2O3: 0.3+/-0.1% Fe2O3: 0.05% Ti2O: max 0.03% CaO : max 0.03% MgO : max 0.03% K2O: max 0.02% Na2O: max 0.02% 4) Size: 36mesh to 325mesh or as per customers request 5) Packing: 1000kgs/fibre bag, 50kgs/fibre bag, 40kgs/fibre bag, 25kg/fibre bag or as per customers request