Monoclinic, Phase transitions, Square pyramid 5-vertex

• Na-O-V
• H-N-O-Se
• Dy-Mn-O
• H-K-O
• O-V
• fusion
• temperature for congruent melting
• structural transitions
• temperature for structural transition
• pressure for structural transition
• chalcogen
• non-disordered
• transitional
• disordered