Er-x polyhedra, Non-disordered, Rare earth, Transitional

• B-Er-Fe
• Co-Er
• Er-Fe
• Ba-Cu-Er-O
• Er-Ni
• magnetic properties
• thermal and thermodynamic properties
• structural properties
• electronic and electrical properties
• magnetization
• transitional
• rare earth
• non-disordered
• lanthanoid
• ternary
• orthorhombic
• tetragonal
• hexagonal
• cubic
• monoclinic