【摘要】 采用场发射电镜(JSM-6700F)和透射电镜(JEM-2000FX)研究了富钴结壳中水羟锰矿的形态和结构。结果表明:水羟锰矿单体片径一般为30~50 nm,集合体成片状或鳞片状;获得了水羟锰矿d=0.142 9 nm的单晶和三连晶电子衍射结构;水羟锰矿中Fe3+、Co3+、Ni3+为高自旋态离子,Co3+、Ni3+、Cu3+易与Mn4+形成类质同像置换,部分Fe3+与Mn4+可能存在有限的类质同像置换,置换反应为3 Mn4+=4Co3+(Ni3+、Cu3+、Fe3+),体系总电价平衡。更多还原

【Abstract】 The authors report the results of study on the crystal habit and texture of vernadite in a co-rich crust from the Central Pacific Ocean using the JEM-6700F and JSM-2000FX.The results show that vernadites generally occur as a schistose singgle crystal,and schistose or scaly aggregates,and that the single schistose is 30-50 nm in size.The single and trilling crystals electron diffraction patterns of vernadites,i.e.,d=0.142 9 nm,were obtained by JEM-2000FX.Fe3+,Co3+,and Ni3+ exist in vernadite as high spin.Co3+,Ni3+,and Cu3+ are easy to substitute for Mn4+ in vernadite in a complete isomorphous form.Mn4+ is replaced by Fe3+ in a limited isomorphous pattern.The reaction is 3Mn4+=4Co3+(Ni3+、Cu3+、Fe3+),reaching the total electrovalent equilibrium in the system.更多还原