Chalcogen, Rare earth, Electronic and electrical properties, Pmmm

• Ba-Cu-O-Y
• Ba-Cu-O-Pr
• Ba-Cu-Eu-O
• Ba-Cu-O-Y-Zn
• Ba-Cu-Gd-O
• conductivity or resistivity
• electrical resistivity
• valence or charge transfer
• rare earth
• chalcogen
• transitional
• alkaline
• oxide
• orthorhombic
• tetragonal
• monoclinic