Bi1.5Hf0.5Nb1.5O9SrTe0.5

• Bi-Hf-Nb-O-Sr-Te
• optical properties
• phonons
• thermal and thermodynamic properties
• wavenumber of optical phonon
• phase transitions
• alkaline
• chalcogen
• nonmetal
• metalloid
• multinary
• orthorhombic
• tetragonal