As-Er, Metalloid

• As-Er-Ni
• As-Er-O
• As-Er-Sc
• As-Co-Er
• thermal and thermodynamic properties
• phase transitions
• electronic and electrical properties
• phase diagram
• rare earth
• metalloid
• pnictogen
• lanthanoid
• transitional
• hexagonal
• cubic
• tetragonal
• trigonal
• orthorhombic