TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Process: The LiPO3 is mixed with ammonium fluoride in a ratio 1:6-9 to form LiPF6. The heating time is carried out for 4-6 hours. Lithium meta phosphate is mixed with ammonium fluoride in a ratio of 1:7 and the mixture heated to 200 degrees C in an electric furnace for 6 hours continuously to get lithium hexafluorophosphate. Lithium carbonate (Li2CO3), lithium oxide (Li2O) or lithium nitrate (LiNO3) is mixed with diammonium hydrogen phosphate and ammonium fluoride in molar ratios 1:2:6-9, preferably 1:1:7. Li2O or LiNO3 is mixed with diammonium hydrogen phosphate and ammonium fluoride in a ratio 1:1:7 and the mixture is heated at 200 degrees C continuously for 12 hours in an electric furnace to obtain LiPF6. Li2CO3 or Li2O or LiNO3 is mixed with diammonium phosphate in the ratio 1:1 and the product is mixed with ammonium fluoride (NH4F) in the ratio 1:7 and heated. The temperature is kept at 150-350 degrees C for the preparation of LiPF6 when LiNO3 or Li2O is the starting material. For Li2CO3, the temperature of heating with ammonium hydrogen phosphate ((NH4)2HPO4) is 600 degrees C and with NH4F mixing and heating, the temperature is kept at 150-350 degrees C. The reactions occur in solid state. The process comprises a two-step reaction of chemical equations (1)-(4). The reaction is carried out in a single step process of chemical equations (5)-(7) at greater than 150-300 degrees C. It can be carried out in a single step of chemical equation (8). Pure dry Li2O or Li2CO3 or LiNO3 is mixed with twice the quantity of diammonium phosphate, i.e. in the molar ratio 1:2 and the mixture is heated in an electric or muffle furnace for 6 hours at 600 degrees C continuously for Li2CO3 and 300 degrees C for Li2O and LiNO 3. The product was dried at 80 degrees C and allowed to react with ammonium fluoride in the molar ratio of 1:greater than 6-8 for 4 hours in an electric furnace continuously at 150-350 degrees C. EXAMPLE - An equimolar mixture of Li2CO3 (AR) (sic) and (NH4)2HPO4 (AR) were ground well to 5 microns and mixed and heated to 600 degrees C for 6 hours continuously. The product was ground well and mixed with NH4F (AR) and the mixture was heated again in the electrical furnace/muffle furnace for 4 hours at 200 degrees C. The product was transparent. The process had an efficiency of greater than 90%.