Bi-O-Sr-Ta, Bi-x polyhedra, Chalcogen, Phase transitions

• Bi-O-Pr-Sr-Ta
• Ba-Bi-O-Sr-Ta
• Bi-Eu-O-Sr-Ta
• Bi-O-Si-Sr-Ta
• structural transitions
• temperature for structural transition
• fusion
• temperature for congruent melting
• pnictogen
• disordered
• alkaline
• chalcogen
• transitional
• orthorhombic
• tetragonal