Non-disordered, P-x polyhedra, Phase transitions, Trigonal

• O-P-Pb
• P
• Al-O-P
• Cu-In-P-Se
• Fe-O-P
• temperature for congruent melting
• fusion
• structural transitions
• temperature for structural transition
• pressure for structural transition
• non-disordered
• pnictogen
• chalcogen
• transitional