Ba-Fe-O, Chalcogen, Oxide, Quadrupole splitting

• Ba-Cu-Fe-O-Y
• Ba-Fe-La-O
• Ba-Fe-O-Y
• Ba-F-Fe-O
• transitional
• chalcogen
• alkaline
• oxide
• disordered
• hexagonal
• tetragonal
• cubic
• orthorhombic
• trigonal