As-O, Chalcogen, Metalloid

• As-Fe-La-O
• As-Fe-O-Sm
• As-F-Fe-La-O
• As-F-Fe-O-Sm
• As-Fe-Nd-O
• thermal and thermodynamic properties
• structural properties
• electronic and electrical properties
• phase transitions
• mechanical properties
• chalcogen
• metalloid
• pnictogen
• transitional
• tetragonal
• monoclinic
• orthorhombic
• triclinic
• trigonal