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nature : AlF3 colorless crystalline three-ramps. Density 2.88. 1040 ° C melting point, boiling point of 1206 ° C (sublimation), slightly soluble in water, soluble in water. A number of hydrates exist : AlF3 9H2O (21 ° C dehydration), AlF3 3.5H2O (>75 ° Cdehydration), AlF3 1. 5H2O (150 ° C dehydration), AlF3 H2O (210 ° dehydration), AlF3 0.5H2O (600 ° C dehydration). For more goods AlF3 3.5H2O. In Aluminum Industry to lower the melting temperature of electrolyte and conductivity for non-ferrous metal and flux, ceramics and ceramic glaze of flux, and the deputy oil production fermentation curbed the role of agent. By aluminum hydroxide react with hydrofluoric acid, heat, dehydration obtained; Anhydrous AlF3 be AlF3 3.5H2O and ammonium fluoride in thermal system.
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