含蛭石晶层间层矿物的可交换性阳离子及交换容量研究

Exchangeable cations and exchange capacity of interstratified minerals with vermiculite layers

对采自新疆尉犁蛭石矿、河南灵宝—陕西潼关蛭石矿的工业蛭石矿物样品进行了可交换性阳离子与交换容量研究 ,发现新疆尉犁蛭石矿金云母蛭石中可交换性阳离子主要为Na+ 和Ca2 + ,其次为Mg2 + 、K+ 、Ba2 + 和Sr2 + ;而河南灵宝—陕西潼关蛭石矿工业蛭石样品的可交换性阳离子主要为Ca2 + 和Mg2 + ,其次为Na+ 、K+ 等。金云母蛭石和绿泥石蛭石间层矿物的阳离子交换容量随间层结构中蛭石晶层的含量增加而增大 ,一般在 5 6 .92～ 98.95mmol/ 10 0g之间 ,仅为蛭石最大阳离子交换容量的一半。金云母蛭石样品阳离子交换容量大小与K2 O含量呈负相关关系 ,与 (Na2 O +CaO)

The changeable cations and the exchange capacities of industry vermiculite samples from the Weli Mine of Xinjiang, the Lingbao Mine of Henan Province and the Tongguan Mine of Shaanxi Province have been studied. It is found that the changeable cations in phlogopite_vermiculite samples from the Weli Mine are mainly Na + and Ca 2+ , followed in importance by Mg 2+ , K +, Ba 2+ and Sr 2+ , while the changeable cations in phlogopite_vermiculite samples from the Tongguan Mine are mainly Mg 2+ and Ca 2+ , with Na + and K + possessing the second place. The cation exchange capacities of phlogopite_vermiculite and chlorite_vermiculite increase with the content of vermiculite crystal layer in interstratified structure. The cation exchange capacities are commonly between 56.92 mmol/100 g and 98.95 mmol/100 g, only half of the maximal value of cation exchange capacity of vermiculite. The cation exchange capacities of phlogopite_vermiculite are negatively related to the content of K 2O and positively related to the content of Na 2O and CaO.