作业帮 > 英语 > 作业

Fe3O4是由离子构成的吗 如果是由分子构成那么为什么也是含有金属元素的化合物呢

来源:学生作业帮 编辑:搜狗做题网作业帮 分类:英语作业 时间:2024/05/15 18:49:25
Fe3O4是由离子构成的吗 如果是由分子构成那么为什么也是含有金属元素的化合物呢
因为看到有的人说,含金属元素的化合物由离子构成
Fe3O4不是由一个1个Fe3O4分子构成的吗
Fe3O4是由离子构成的吗 如果是由分子构成那么为什么也是含有金属元素的化合物呢
Fe3O4的确是离子构成的,但是你看到的说法是完全错误的,含金属元素的化合物不一定由离子构成
等轴晶系,a0=0.8396nm;Z=8.反尖晶石型结构.即1/2的Fe3 和全部的Fe2 占据八面体位置,另1/2的Fe3 占据四面体位置.晶格常数a0随Al3 、Cr3 、Mg2 替代量的增大而减小;随Ti4 、Mn2 的替代量增高而增大.
Structure
Fe3O4 has a cubic inverse spinel structure which consists of a cubic close packed array of oxide ions where all of the Fe2+ ions occupy half of the octahedral sites and the Fe3+ are split evenly across the remaining octahedral sites and the tetrahedral sites.
Both FeO and γ-Fe2O3 have a similar cubic close packed array of oxide ions and this accounts for the ready interchangeability between the three compounds on oxidation and reduction as these reactions entail a relatively small change to the overall structure.[2] Fe3O4 samples can be non-stoichiometric.[2]
The ferrimagnetism of Fe3O4 arises because the electron spins of the FeII and FeIII ions in the octahedral sites are coupled and the spins of the FeIII ions in the tetrahedral sites are coupled but anti-parallel to the former.The net effect is that the magnetic contributions of both sets are not balanced and there is a permanent magnetism.[2]