Alkali, Chalcogen, Orthorhombic, Phase transitions

• Na-Nb-O
• H-Li-N-O-S
• Na-O-V
• H-K-O-P
• K-Na-Nb-O
• fusion
• temperature for congruent melting
• structural transitions
• temperature for structural transition
• decomposition
• alkali
• chalcogen
• transitional
• non-disordered