Materials in the CaO-K2O-SO3-H2O System Based on Powder Mixtures including Calciolangbeinite K2Ca2(SO4)3 and Calcium Sulfate Anhydrite CaSO4

Materials (cement stone samples) in the CaO-K2O-SO3-H2O system with target phase compositions, including syngenite K2Ca(SO4)2·H2O and calcium sulfate dihydrate CaSO4·2H2O, were prepared from powder mixtures of anhydrite CaSO4, and/or calciolangbeinite K2Ca2(SO4)3, potassium K2SO4 via hydration reactions at a water/powder ratio within an interval 0.5–0.9. It was revealed that samples contents 25, 50, 75 100 mol% demonstrated nonlinear dependence their respective microstructures on compositions. The compositions 25 consisted pillar crystals. 50 plate An explanation microstructure formation set forth, taking into account equilibria dissolution–crystallization processes during cement formation. obtained consisting biocompatible resorbable (soluble water) phases can be recommended for testing as potential substances bone defect treatments.