Compound Formula Composition Maria Highlands silica SiO2 45.4% 45.5% alumina Al2O3 14.9% 24.0% lime CaO 11.8% 15.9% iron(ii) FeO 14.1% 5.9% magnesia MgO 9.2% 7.5% titanium TiO2 3.9% 0.6% sodium Na2O 0.6% 0.61%
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