Alkali, Chalcogen, Transitional, Phase transitions, Trigonal

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