I’ve just updated the Tools for Petrologists page with a new conversion tool. It’s the Oxide to Element Conversion Tool, an Excel spreadsheet that will convert composition values from wt% oxides (ie. SiO2, Na2O, K2O, etc) to wt% element (ie. Si, Na, K, etc.) and vice versa.
After some googling, I found that some tools like this exist already. But, I made my own that was best formatted to my needs, and hopefully you can find it useful too. Enjoy!
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