Apatite, Disordered, Rare earth, Electronic energy gap, Hexagonal

• La-O-Si-Sr
• Ge-La-Na-O
• Ca-La-O-Si
• Ca-F-La-O-P-Si
• B-La-O-Si
• values of electronic energy gap
• energy gap for direct transition
• thermal energy gap
• spin-orbit splitting of valence band
• rare earth
• disordered
• apatite
• chalcogen