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["Recalculation of a mineral formula using a fixed number of oxygens per formula."]
[]
["This spread sheet converts all iron to Fe+3 for an epidote analysis."]
[]
["Oxygens per formula =",null,12.5]
[]
[null,null,"FeO only","Fe2O3 only","Mole","Oxygen","Normaliz.","Atom"]
["Oxide","GFW","Wt.%","Wt.%","Units","Units","Ox Units","Units"]
[]
["SiO2",60.084,36.89,36.89,0.613973770055256,1.227947540110512,5.999100715621917,2.9995503578109584,"Si"]
["TiO2",79.866,0,0,0,0,0,0,"Ti"]
["Al2O3",101.961,20.94,20.94,0.2053726424809486,0.6161179274428459,3.0100255741358666,2.0066837160905777,"Al"]
["Fe2O3",159.688,null,15.920122765992984,0.09969517287456155,0.29908551862368465,1.4611732913655429,0.9741155275770286,"Fe+3"]
["FeO",71.844,14.325,{"$nulls":5},"Fe+2"]
["MnO",70.937,0.13,0.13,0.001832612036031972,0.001832612036031972,0.008953170895091584,0.008953170895091584,"Mn"]
["MgO",40.304,0.14,0.14,0.0034736006351726877,0.0034736006351726877,0.016970171261855217,0.016970171261855217,"Mg"]
["CaO",56.077,23,23,0.41015032901189435,0.41015032901189435,2.003777076719726,2.003777076719726,"Ca"]
["Na2O",61.979,0,0,0,0,0,0,"Na"]
["K2O",94.196,0,0,0,0,0,0,"K"]
["H2O",18.015,1.93,1.93,null,null,null,1,"H"]
[]
["Totals",null,97.355,98.95012276599299,1.3344981270938652,2.5586075278601417,12.5,9.010050020355237]
[]
[{"$nulls":6},"Sum Si =",2.9995503578109584,null,"The \"Sum\" values are summations of the column of \"Atom Units\" "]
[null,null,"All Ferric Iron",null,null,null,"Sum Al =",5.0062340739015365,null,"down to the element listed.  For example, \"Sum Mg\" would be the"]
[{"$nulls":6},"Sum Mg =",6.006272943635512,null,"sum of the \"Atom Units\" for Si, Ti, Al, Fe+3, Fe+2, Mn, and Mg."]
[{"$nulls":6},"Sum Ca =",8.010050020355237,null,"The choice of \"Sums\" is based on cation sizes and site occupancies."]
[{"$nulls":6},"Sum K =",8.010050020355237]
[]
["Wt% Fe2O3 = Wt%FeO*159.692/(2*71.846) = Wt%FeO*(1.111349275)"]
[]
["Mole#Fe2O3 = Wt%Fe2O3/159.692 = Wt%FeO/(2*71.846)"]