我错过了什么?< / p >
For what you want to do, going from wt% element to wt% oxide, all you have to do is multiply by a conversion factor, which is 2.1393 for silicon (the 0.4674 factor you mentioned is to go the other way around, from oxide to element). Be careful with iron, there are two different factors depending on the state of oxidation ($\ce{FeO}$ vs. $\ce{Fe2O3}$), but I'm not sure how you can discriminate between the two with your elemental analysis...
除以元素的摩尔质量,再乘以氧化物的摩尔质量。例如,硅的摩尔质量是28.085,氧化物的摩尔质量是28.085 + 2×15.999 = 60.08。注意,这必须是在单阳离子的基础上。对于像Na2O或Al O3这样的氧化物,你实际上需要NaO0.5和AlO1.5的摩尔质量。
相反。除以氧化物的摩尔质量,再乘以元素的摩尔质量。以59.3% SiO2为例,答案是59.3/60.08×28.085=27.72%