Chalcogen, Electronic and electrical properties, P-x polyhedra, Trigonal

• Ca-Fe-O-P
• Al-Ge-Li-O-P-Ti
• Al-O-P
• O-P
• Bi-Cu-P-Se
• electrical conductivity
• effective mass
• electronic energy gap
• values of electronic energy gap
• conductivity or resistivity
• chalcogen
• pnictogen
• orthophosphate
• transitional