Chalcogen, Rare earth, Transitional, Karen, Structural properties

• Ba-Fe-La-O
• Ba-Fe-O-Y
• Ba-Fe-Nd-O
• Ba-Fe-Gd-O
• Ba-Fe-O-Sm
• transitional
• chalcogen
• rare earth
• alkaline
• oxide
• orthorhombic
• tetragonal
• cubic
• hexagonal