Chalcogen, Lanthanoid, Rare earth, Jcrgae

• Ho-O-Ti
• Ce-O-P-Ru
• Ba-Cu-Nd-O
• B-Ca-Gd-O
• Ga-La-O
• structural properties
• optical properties
• magnetic properties
• electronic and electrical properties
• phase transitions
• rare earth
• chalcogen
• lanthanoid
• transitional
• quaternary
• orthorhombic
• monoclinic
• tetragonal
• cubic
• trigonal