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测定了NH_4~+-K~+、NH_4~+-Ag~+两个体系在浙江省缙云县岱石口的天然丝光沸石和合成丝光沸石上的离子交换平衡等温线,并计算出其热力学平衡常数Ka和标准自由能变化△G~0。对比这些效据,说明在岱石口天然沸石晶体结构中的“堆积层错”要比合成沸石结构中的严重。确定了岱石口天然丝光沸石的化学式为: 0.53 CaO·0.40 Na_2O·0.045 K_20·0.02 MgO·0.96 Al_2O_3·0.04Fe_2O_3·10 SiO_2·7.09 H_2O 这种丝光沸石中含有Na~+、K~+、Ca~+、Mg~(++)四种可以交换的离子,而Na~+、K~+比Ca~(++)、Mg~(++)容易被交换。
The ion exchange equilibrium isotherms of NH4 +, K4 +, NH4 +, Ag2 + and Zn3 + on mordenite and synthetic mordenite were measured at Daiishikou, Jinyun County, Zhejiang Province. The thermodynamic equilibrium constants Ka and standard free energy change △ G ~ 0. Comparing these data shows that the “stacked faults” in the crystal structure of natural zeolite in Dai Shikou are more serious than those in the synthesized zeolite. The chemical formula of natural mordenite at Dai Shekou was determined as follows: 0.53 CaO · 0.40 Na_2O · 0.045 K_20 · 0.02 MgO · 0.96 Al_2O_3 · 0.04Fe_2O_3 · 10 SiO_2 · 7.09 H_2O This mordenite contains Na ~ +, K ~ +, Ca ~ +, Mg ~ (+ +) four kinds of exchangeable ions, while Na ~ +, K ~ + than Ca ~ (++), Mg ~ (++) easy to be exchanged.