Structural Probe of Eu2+ in Phase Transformation of CMSA by Eu2+ Site-Selective Occupancy and Adjustable Multimode White Luminescence in Ca2(Mg0.5Al0.5)(Si1.5Al0.5O7) Akermanite Based on High-Aluminum Blast Furnace Slag

The (Mg 2+ → Al 3+ )O 4 tetrahedron expansion causes Eu 2+ emission blue shift and the (Si 4+ → Al 3+ )O 4 tetrahedron shrinkage gives Eu 2+ emission red shift. So structural probe of Eu 2+ was explored by Eu 2+ site-selective occupancy in akermanite.