跪求高手.... 小弟碰到一個棘手問題... 日前小弟被教授分配到跟韓國人一組.... 然後我們兩各自分配解決一些題目... 但不幸的是... 小弟兩道問題解不出來... 這兩天一直被韓狗人抱怨說何時才能有答案... 所以小弟希望能有高手出面幫忙解決這兩道問題 ===================分隔線============================= 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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