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The solubility of lithium oxide was measured in molten LiCl−KCl containing (58.5, 75, 90, and 100) mol % LiCl in the temperature range of (673 to 923) K. The melt with a higher content of LiCl has a higher solubility of Li 2 O. The pure LiCl has the highest solubility of Li 2 O, (12.0 ± 0.2) mol % at 923 K. The estimated standard formal potential of O 2 /O 2− increases linearly as the temperature decreases and as the mole fraction of LiCl increases.
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Kado et al. (2008) studied this question.
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