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Potassium as K2O: *2.*5% , Sodium as Na2O: 2.*8%, Silica as SiO2: *5.*3%, Alumina as Ai2O3 *8.*3%, Calcium Oxide as CaO:0.*8% Feldspar is a common raw material used in glassmaking, ceramics, and to some extent as a filler and extender in paint, plastics, and rubber. In glassmaking, alumina from feldspar improves product hardness, durability, and resistance to chemical corrosion. In ceramics, the alkalis in feldspar (calcium oxide, potassium oxide, and sodium oxide) act as a flux, lowering the melting temperature of a mixture. Fluxes melt at an early stage in thefiring process, forming a glassy matrix that bonds the other components of the system together. In the US, about *6% of feldspar is consumed in glassmaking, including glass containers and glass fiber. Pottery (including electrical insulators, sanitaryware, tableware, and tile) and other uses, such as fillers, accounted for the remainder 1. Potassium as K2O *2.*5% 2. Sodium as Na2O 2.*8% 3. Silica as SiO2 *5.*3% 4. Alumina as Ai2O3 *8.*3% 5. Calcium Oxide as CaO 0.*8% 6. Magnesium Oxide as MgO 0.*0% 7. Ferric Oxide as Fe2O3 0.**9% 8. Titanium as TiO2 0.**1% 9. LOI 0.*9%