Alkali, Chalcogen, Phase transitions, Trigonal

• Bi-Na-O-Ti
• Li-O-Ta
• N-Na-O
• Li-Nb-O
• N-O-Rb
• temperature for congruent melting
• fusion
• structural transitions
• temperature for structural transition
• decomposition
• chalcogen
• alkali
• transitional
• disordered