Ul ain

• Ba-Co-Fe-O
• Ba-Co-Fe-Mn-O-Ti
• Ba-Co-Fe-Ni-O-Zr
• Ba-Bi-Ca-Cu-Li-O-Tl
• Ba-Be-Bi-Ca-Cu-Li-O-Tl
• structural properties
• alkaline
• transitional
• chalcogen
• multinary
• quaternary
• trigonal