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Cryolite `(Na_(3)AlF_(6))` and Fluorspar `(CaF_(2))`areused to increases the melting point of alumina.

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Cryolite `(Na_(3)AlF_(6))` and Fluorspar `(CaF_(2))`areused to increases the melting point of alumina.
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Cryolite `(NaAlF_(6))` and fluorspar `(CaF_(2))` are used to lower the metling point of alumina
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