As-O, Pnictogen, Structural properties

• As-Fe-La-O
• As-F-Fe-O-Sm
• As-Fe-O-Sm
• As-Fe-Nd-O
• mechanical properties
• compressibility
• thermal and thermodynamic properties
• thermal expansion
• chalcogen
• metalloid
• pnictogen
• transitional
• tetragonal
• monoclinic
• orthorhombic
• triclinic
• trigonal