Chalcogen, Nonmetal, Enthalpy change at structural transition

• H-Li-N-O-S
• H-N-O-Se
• Ba-O-Ti
• O-V
• K-O-Se
• chalcogen
• nonmetal
• non-disordered
• transitional
• disordered
• orthorhombic
• monoclinic
• cubic
• trigonal
• tetragonal