Ivleva

• Ba-Nb-O-Sr
• Ba-Nb-Ni-O-Sr
• B-Ba-O
• Ba-Nb-O-Sr-Yb
• Ba-Cr-Nb-O-Sr
• structural properties
• phase transitions
• phase diagram
• optical properties
• chalcogen
• transitional
• alkaline
• disordered
• tetragonal
• cubic
• monoclinic
• trigonal
• orthorhombic