7. Crystallography and crystal chemistry of AFm phases related to cement chemistry

Ettringite and AFm phases (aluminum-iron-mono phases) are the main hydration products of aluminate and ferrate phases during the reaction of cementitious materials. The different AFmphases can incorporate many anions, structurally unnecessary water, and uncharged molecules. The paper summarizes the crystal chemistry of the entire family of potentially occurring AFm phases in hydrated cements and newly formed phases during cement deterioration reactions.