Chalcogen, Disordered, Enthalpy change at structural transition

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