【摘要】 多金属结核样品在室温中放置或加热干燥后 ,其中的 1nm锰矿相会部分或全部地相变为 0 7nm锰矿相 ,这说明 0 7nm锰矿相可能不是多金属结核的原生锰矿相 ,而仅仅是 1nm锰矿相的相变产物。研究结果表明 :1nm锰矿相结构中的Cu2 + 、Co2 + 、Ni2 + 等金属阳离子的含量与其结构稳定性有正相关关系 ,即金属离子含量越高 ,其结构越稳定 ,1nm锰矿相越不易相变为 0 7nm锰矿相 ,反之亦然 ;另外 ,不同金属阳离子稳定 1nm锰矿相结构的能力也不同 ,结核中几种主要金属阳离子对 1nm锰矿相结构的稳定能力从大到小为 :Ni2 + >Cu2 + >Co2 + >Zn2 + >Ca2 + =Mg2 + 。更多还原

【Abstract】 It is found that more or less 1nm manganate in polymetallic nodules can be changed into 0.7nm manganate after dried or heated at room temperature for 5 hours. This could be inferred that the 0 7nm manganate in the nodule is not the original mineral phase but only the product of phase change from the 1nm manganate. It is also found that there is a positive correlation between the structural stability of 1nm manganate and the volume of cations in the structure. Different cations have different contributions to the stabilization of the structure of 1nm manganate, and the sequence of the stabilizing capacity of the cations may follow the order of Ni 2+>Cu 2+>Co 2+>Zn 2+>Ca 2+ = Mg 2+.更多还原