tetra-calcium aluminoferrite

chemical compound

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June 17, 2026

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Tetra-calcium aluminoferrite, also known as brownmillerite, is a chemical compound with the formula Ca₂AlFeO₅. It is an oxide composed of calcium, aluminum, and iron. Brownmillerite is considered a type of calcium aluminate, which are compounds of lime and alumina crucial in hydraulic cements.12

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Chemical composition
… (3CaO · Al₂O₃), and a tetra-calcium aluminoferrite (4CaO · Al₂O₃Fe₂O₃). In an abbreviated notation differing from the normal atomic symbols, these compounds are designated as C₃S, C₂S, C₃A, and C₄AF, where C stands for calcium oxide (lime), S for silica, A for alumina, and F for iron
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… (3CaO · Al₂O₃), and a tetra-calcium aluminoferrite (4CaO · Al₂O₃Fe₂O₃). In an abbreviated notation differing from the normal atomic symbols, these compounds are designated as C₃S, C₂S, C₃A, and C₄AF, where C stands for calcium oxide (lime), S for silica, A for alumina, and F for iron
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