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10-水锰矿是海洋成岩型铁锰结核和很多陆生锰矿的主要矿物,铜、镍等过渡金属元素对于10-水锰矿结构的稳定起着重要的作用,而对于碱金属元素钠离子在其中的地球化学行为则少有涉及.利用取自东太平洋海底的成岩型铁锰结核,借助化学方法,利用矿物学和晶体化学的理论对碱金属元素钠离子在成岩型铁锰结核中的存在状态以及对结核组成矿物10-水锰矿结构的影响进行了研究.结果显示,10-水锰矿中钠离子可以被弱酸析出并且会导致其结构的破坏,使得10-水锰矿转换成7-水锰矿;析出钠离子并且结晶状态变差的10-水锰矿吸附钠离子后,其结晶状态可明显好转并且部分非10相转化为10-水锰矿,但是这种结构的破坏在自然条件下不能完全恢复.因此,钠离子对于10-水锰矿结构的稳定性起着非常重要的作用.
Manganese ores are the main minerals of marine diagenetic Fe-Mn nodules and many terrestrial manganese ores. The transition metal elements such as copper and nickel play an important role in the stabilization of 10¡¯-manganite structure. However, for the alkali metal elements sodium ion Among them, the geochemical behavior is rarely involved.Using the diagenetic Fe-Mn nodules taken from the seabed of the Eastern Pacific Ocean and using chemical methods and the theory of mineralogy and crystallochemistry, the alkali-metal sodium ions in diagenetic Fe-Mn nodules Existing state and the influence on the structure of the 10¡¯-manganite mineral in the nodules.The results show that the sodium ions in 10¡¯-manganite can be precipitated by weak acid and lead to the destruction of its structure, 7-manganite; after sodium ions are precipitated and the crystalline state of 10-manganite adsorbs sodium ions, its crystalline state can be obviously improved and part of the non-10-phase is transformed into 10-manganite. However, this structure is destroyed by Natural conditions can not be fully restored, therefore, sodium ions for the 10 ~ -hydromorphine structure plays a very important role in the stability.