Chalcogen, Disordered, Nonmetal, Structural transitions, Trigonal

• Bi-Fe-O
• Bi-Na-O-Ti
• H-N-O-Se
• F-Fe-H-O-Si
• Ba-Ca-O-Ti-Zr
• temperature for structural transition
• pressure for structural transition
• pressure derivative of transition temperature
• chalcogen
• disordered
• nonmetal
• transitional
• oxide