Zeolite-A was synthesized from kaolin activated at 500 °C at relatively lower temperature than the studies reported in the literature.The metakaolin formed at 500 °C was used to synthesise zeolite-A by treating with 1–5 M NaOH solutions at 80–100 °C for 3–24 h under hydrothermal reaction condition. The zeolite-A was characterized by XRD, FT-IR and SEM. The percentage of crystallinity and crystallite sizes of the zeolite-A were determined by using Rietveld analysis; the crystal system of zeolite-A was found to be cubic with space group ($Fm\overline{3}c$ ). The ion-exchange property of zeolite-A for Cs⁺ and Sr⁺² was explored at ambient temperature (25 °C). The adsorption efficiency of zeolite-A is higher for Sr⁺² than that of Cs⁺; and adsorption capacities for Cs⁺ and Sr²⁺ ions were found to be 91.51% and 99.16% respectively. Strontium substituted zeolite has higher crystallinity and lattice strain than that of caesium substituted zeolite-A. Structural stability investigations were carried out on pristine zeolite-A and its Cs⁺ and Sr²⁺ substituted analogues by using high-pressure (0.1 MPa-11.4 GPa) X-ray diffractometry technique for the first time. The pristine zeolite-A shows comparatively lower bulk modulus than that of caesium and strontium loaded zeolite. It is also seen that the compressibility is least for the strontium loaded zeolite-A (SrZtA) followed by caesium loaded zeolite-A (CsZtA) and pristine zeolite-A (ZtA) (i.e compressibility of SrZtA < compressibility of CsZtA < compressibility of ZtA).

沸石A是由在500°C下活化的高岭土合成的，合成温度低于文献报道的温度。在500°C下形成的偏高岭土通过在80–80℃下用1–5 M NaOH溶液处理来合成沸石在水热反应条件下100°C持续3–24 h。通过XRD，FT-IR和SEM对沸石-A进行了表征。使用Rietveld分析确定沸石-A的结晶度百分数和晶粒尺寸。发现A型分子筛的晶体系统为立方晶且空间群为（$F米\overline{3}C$）。在环境温度（25°C）下研究了沸石-A对Cs ⁺和Sr ⁺²的离子交换性能。沸石-A对Sr ⁺²的吸附效率高于对Cs ⁺的吸附效率；Cs ⁺和Sr ²⁺离子的吸附容量分别为91.51％和99.16％。锶取代的沸石具有比铯取代的沸石-A更高的结晶度和晶格应变。对原始沸石-A及其Cs ⁺和Sr ²⁺进行结构稳定性研究首次使用高压（0.1 MPa-11.4 GPa）X射线衍射技术替代了类似物。原始沸石-A的体积模量比铯和锶负载的沸石低。还可以看出，锶负载沸石-A（SrZtA）紧随其后，铯负载沸石-A（CsZtA）和原始沸石-A（ZtA）的可压缩性最低（即，SrZtA的压缩性<CsZtA的压缩性<ZtA的压缩性）。