De with

• Eu-N-Si-Sr
• N-Si-Sr
• Ca-Eu-N-Si-Sr
• Ca-Eu-N-Si
• Al-Ce-F-Na-O-Sr
• optical properties
• reflectivity
• structural properties
• values of reflectivity
• luminescence
• alkaline
• pnictogen
• metalloid
• nonmetal
• rare earth
• orthorhombic
• tetragonal
• hexagonal
• monoclinic
• cubic