Chalcogen, Rare earth, Er-x polyhedra, Monoclinic

• Er-S
• Er-O-Si
• Er-H-N-O
• Er-H-O-S
• Er-O-Ta
• thermal and thermodynamic properties
• structural properties
• electronic and electrical properties
• phase transitions
• mechanical properties
• chalcogen
• rare earth
• lanthanoid
• non-disordered