Chalcogen, Enthalpy change at structural transition

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