【摘要】 本文测定了三元体系La₂（SO₄）₃-CH₃CONH₂-H₂O在O℃,30℃时的溶度和30℃时饱合溶液的折光率,并绘制了溶度图和折光率曲线。实验结果表明,体系在0℃,30℃时溶度线有两支,分别与La₂（SO₄）₃·9H₂O和CH₃CONH₂相对应。体系中只生成一种水合物La₂（SO₄）₃·9H₂O,其溶解度随温度的降低而增大。更多还原

【Abstract】 The solubilities and the refractive indexes in the tiled system havebeen studied isothermaly at 0 and 30℃. The system is of simple eutonictype without the formation of new compounds. Its isotherms consist oftwo branches, corresponding to La₂ （SO₄）₃. 9H₂O and CH₃CONH₂ respect-ively.更多还原