MineralogyLie #1: A mineral has a definite chemical compositionAnalyses of SphaleriteRecalculated Sphalerite(Zn,Fe)SHow do you represent data in a binary system?How do you represent data in a ternary system?MineralogyMineralogyGeol 2311-part 2Geol 2311-part 2Lie #1: A mineral has a Lie #1: A mineral has a definite chemical definite chemical compositioncompositionLet’s take sphalerite for exampleLet’s take sphalerite for exampleAnalyses of SphaleriteAnalyses of SphaleriteFe (wt%) 0.15 7.99 11.05 18.25Mn (wt%) - - - 2.66Cd (wt%) - 1.23 0.3 0.28Zn (wt%) 66.98 57.38 55.89 44.67S (wt%) 32.78 32.99 32.63 33.57Total 99.91 99.59 99.87 9 9.43Recalculated SphaleriteRecalculated SphaleriteCation/S is 1:1Cation/S is 1:1Fe 0.003 0.143 0.198 0.327Mn - - - 0.048Cd - 0.011 0.003 0.003Zn 1.026 0.879 0.856 0.684 1.029 1.033 1.057 1.062S 1.024 1.032 1.02 1.049(Zn,Fe)S(Zn,Fe)S22ndnd lie: didn’t follow the PDFN order lie: didn’t follow the PDFN orderChemical substitution orChemical substitution orSolid SolutionSolid Solution(Zn(Zn0.640.64FeFe0.310.31MnMn0.050.05)S)SHow do you represent How do you represent data in a binary system?data in a binary system?How do you represent How do you represent data in a ternary system?data in a ternary
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