Chalcogen, Rare earth, Structural transition

• Eu-O-Ti
• Co-La-O-Sr
• Ba-Co-Ho-O
• Ba-Nd-O-Ti
• Ce-H-N-O
• chalcogen
• rare earth
• lanthanoid
• transitional
• oxide
• monoclinic
• cubic
• tetragonal
• orthorhombic
• trigonal