A study of the effects induced by a weak magnetic field of about 0.4 T on the precipitation of insoluble alkaline earth carbonates is reported. Optical microscopy, X-ray diffraction and fluorescence experiments are employed at 25 °C and 60 °C in either H 2 O or D 2 O solutions to explore the role played by temperature and solvent structure on the magnetic effect. The results reveal that the combination of an external magnetic field and high temperature limits the precipitation of scarcely soluble salts with the strongest effect on calcium carbonate. Furthermore, it is found that the magnetic field affects the structure of the solvent molecules in the hydration shells of the ions. The current work represents a step forward in our understanding of the curious effects of magnetic fields on salt precipitation. It may have application in various areas of chemical science, such as water treatment, shale gas extraction, colloid science, biology, and chirality.

中文翻译：

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温度和磁场对碱土金属不溶性盐沉淀的影响

研究了约 0.4 T 的弱磁场对不溶性碱土金属碳酸盐沉淀的影响。在 25 °C 和 60 °C 下，在 H 2 O 或 D 2 O 溶液中使用光学显微镜、X 射线衍射和荧光实验来探索温度和溶剂结构对磁效应的影响。结果表明，外部磁场和高温的结合限制了难溶盐的沉淀，对碳酸钙的影响最强。此外，还发现磁场影响离子水合壳层中溶剂分子的结构。目前的工作代表了我们对磁场对盐析的奇怪影响的理解向前迈进了一步。