Alkali, Chalcogen, Phase transitions, Tetragonal

• K-Na-Nb-O
• H-K-O-P
• Bi-Na-O-Ti
• K-Nb-O
• H-O-P-Rb
• fusion
• temperature for congruent melting
• structural transitions
• temperature for structural transition
• decomposition
• chalcogen
• alkali
• transitional
• disordered