Ba-Cu-O-Y, Phase transitions, Quaternary

• Ba-Cu-Er-O
• Ba-Cu-Eu-O
• Ba-Cu-Gd-O
• Ba-Cu-Dy-O
• phase diagram
• structural transitions
• temperature for structural transition
• fusion
• quaternary
• rare earth
• alkaline
• chalcogen
• transitional
• orthorhombic
• tetragonal
• cubic
• trigonal