Coplanar triangle 3-vertex, Phase transitions, Trigonal

• Bi-Fe-O
• B-Fe-Gd-O
• B-Fe-O-Tb
• N-Na-O
• O-Pb-Ti-Zr
• temperature for congruent melting
• fusion
• structural transitions
• temperature for structural transition
• pressure for structural transition
• chalcogen
• non-disordered
• transitional
• disordered