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中文摘要：
利用^1H、^29Si、^23Na多核固体核磁共振（NMR）以及X射线衍射技术研究了层状二硅酸钠SKS-6与同一浓度氯化钙溶液反应不同时间的产物,探讨了SKS-6的钙离子脱除过程.实验揭示出SKS-6是通过钙离子与钠离子之间的快速置换来脱除钙离子,钙离子快速取代钠离子与SKS-6中的硅氧四面体结合,使得硅氧四面体层发生扭曲,骨架有序度降低,但是原有的层状结构仍然保持.延长反应时间对该过程没有明显的促进作用,说明钙离子对钠离子的取代在很短的时间（1 min）内就已经完成.延长反应时间只是促进了SKS-6中桥式和非桥式氧原子的水解,并使得产物中kanemite相的钠离子与水分子的配合发生变化.
英文摘要：
The reactions of layered sodium disilicate SKS-6 and calcium chloride solution with invariant concentration reacted for different reaction times were studied using solid-state ^1H, ^29Si, and ^23Na nuclear magnetic resonance （NMR） spectroscopy as well as X-ray powder diffraction technique. On the basis of the experimental results the calcium ions extracting process of SKS-6 was shown to be rapid ions substitution of sodium ions by calcium ions. After substitution, calcium ions combined with the SiO4 tetrahedrons in SKS-6, and the ordering of the silicate layer was decreased to a certain extent, with the survival of original layered structure. Ion substitution rapidly proceeded and almost was completed within 1 min because prolonging the reaction time introduced no obvious variation in it. Prolonging the reaction time just prompted the hydrolysis of bridging as well as nonbridging oxygen atoms in SKS-6, and simultaneously changed the chemical circumstance of sodium ions in the newly formed kanemite phase.
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