H-N-O-Se, Phase transitions, Se-x polyhedra, Tetraoxoselenate

• H-N-Na-O-Se
• H-N-O-Se-Te
• Cu-H-N-O-Se
• H-N-O-Se-V
• structural transitions
• temperature for structural transition
• fusion
• temperature for congruent melting
• decomposition temperature
• pnictogen
• chalcogen
• tetraoxoselenate
• non-disordered
• nonmetal
• monoclinic
• triclinic
• trigonal
• orthorhombic