Barkovskii

• Ba-Bi-O
• Ba-Bi-K-O
• Ba-Cu-O
• Ba-Cu-O-Y
• Cu-Eu-O
• structural properties
• phase transitions
• phase diagram
• superconductivity
• chalcogen
• alkaline
• pnictogen
• ternary
• oxide
• orthorhombic
• cubic
• tetragonal
• monoclinic
• trigonal