READING ASSIGNMENTS NESSE: Pages 71-72, Structural formulas of minerals Pages 172, -174, Recalculation of mineral formulas. DEER, HOWIE, AND ZUSSMAN: Pages 515-517, how to recalculate analyses with some more difficult examples like a hornblende. Page 518, a table of molecular weights for most of the oxides. Here is a spreadsheet with instructions on how to recalculate mineral formulas. Right click to download, left click to see the files in Internet Explorer. Instructions for recalculation of mineral formulas Plagioclase recalculation worksheet (Excel file) Use the following olivine analyses to create a recalculation worksheet for Olivine similar to the plagioclase worksheet. Olivine analyses (Excel file) Try plotting the feldspar compositions on this graph. You can get more analyses to work with from Deer, Howie, and Zussman (the little black and white optical book) if you want to practice. Ternary graph