Chalcogen, Lanthanoid, Rare earth, Values of electronic energy gap

• La-Mn-O-Sr
• Ce-O
• La-Mo-O
• Nd-O-Ti
• Mo-O-Pr
• rare earth
• chalcogen
• lanthanoid
• transitional
• orthorhombic
• monoclinic
• tetragonal
• cubic
• trigonal