Alkali, Chalcogen, Non-disordered, Phase transitions, Tetragonal

• H-K-O-P
• K-Nb-O
• H-O-P-Rb
• As-H-K-O
• K-Li-Nb-O
• temperature for congruent melting
• fusion
• structural transitions
• temperature for structural transition
• decomposition
• non-disordered
• alkali
• chalcogen
• transitional