Calcium sulfoaluminate (CA)cementisabinderofincreasinginteresttothecementindustryandisundergoingrapiddevelopment.Currentformulationsdonotcontainalite;however,alitecalciumsulfoaluminate(a−CA) cements can combine the favourable characteristics of Portland cement (PC) with those of CAcementwhilealsohavingalowercarbondioxidefootprintthanthecurrentgenerationofPCclinkers.Thispaperpresentstworesultsontheformationofa−CA clinkers. The first is a thermodynamic study demonstrating that the production of a-CAclinkerispossiblewithouttheuseofmineralisers,dopingwithforeignelements,orusingmultiplestagesofheating.Itisestablishedthata−CA clinker can be readily produced in a standard process by controlling the oxygen and sulfur dioxide fugacity in the atmosphere. This allows for the stabilisation of ye’elimite to the higher temperatures required for alite stability. The second result establishes that when using fluorine to mineralise a-C$A clinker production, the iron content in the clinker is also an important variable. Although the exact mechanism of alite stabilisation is not known, it is shown that alite formation increases with the combination of calcium fluoride and iron (III) oxide in the mix