Electronic energy gap, Na-P

• H-Na-O-P
• Na-O-P-V
• H-Na-O-P-Zn
• Co-Na-O-P
• Fe-Na-O-P
• values of electronic energy gap
• energy gap for direct transition
• energy gap for indirect transition
• alkali
• pnictogen
• chalcogen
• orthophosphate
• monoclinic
• orthorhombic
• trigonal
• triclinic
• hexagonal