4, Alkali, Chalcogen, Pnictogen, Phase transitions

• H-Li-N-O-S
• Cs-H-O-P
• H-K-O-P
• H-N-Na-O-Se
• As-H-Na-O-P
• fusion
• temperature for congruent melting
• structural transitions
• temperature for structural transition
• decomposition temperature
• pnictogen
• chalcogen
• alkali
• non-disordered
• monoclinic