Chalcogen, Oxide, Rare earth, Transitional, Pressure for structural transition

• Ba-Cu-O-Y
• O-Y
• Bi-Eu-Fe-O
• Ba-Cu-La-O
• Gd-O-Zr
• rare earth
• transitional
• oxide
• chalcogen
• lanthanoid
• orthorhombic
• tetragonal
• cubic
• monoclinic
• trigonal