跪求高手.... 小弟碰到一个棘手问题... 日前小弟被教授分配到跟韩国人一组.... 然後我们两各自分配解决一些题目... 但不幸的是... 小弟两道问题解不出来... 这两天一直被韩狗人抱怨说何时才能有答案... 所以小弟希望能有高手出面帮忙解决这两道问题 ===================分隔线============================= 3.A crystal of ferrous oxide FeyO is found to have a lattice parameter a = 0.43 nm and a density of 5.72 g/cm3. What is the composition of the crystal (i.e. the value of y in FeyO?) Clear state all assumptions. For Fe0.98O, the density is 5.7 g/cm3. Calculate the site fraction of iron vacancies and the number of iron vacancies per cubic centimeter. 4.Apply Pauling’s second rule to the inverse spinel structure. Discuss the linkage between octahedral and tetrahedral sites. Draw a (110) plane for structure and label the ions and unoccupied sites. --

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