The Al-Rich Part of the System CaO-Al2O3-MgO: Part I. Phase Relationships

摘要: Abstract In the Al-rich part of ternary system CaO-Al 2 O 3 MgO two new phases Ca Mg Al 28 46 (CAM-I) and CaMg 16 27 (CAM-II) with limited solid solution ranges were found. Due to fact that compositions Mg-rich end members these solutions lie on join between hibonite (CaAl 12 19 ) spinel (MgAl 4 ), model crystal structures can be constructed by a suitable combination units. Both phases, CAM-I CAM-II, exhibit described substitution mechanism also found in binary phase, MgAl : 2+ = 3+ + □. Thus expressed chemical formulas. 2-3 x 28+2 □ for 0 ≤ 0.30 y 16+2 CAM-II 0.2.