Ba-Sr, Fusion, Tetragonal

• Ba-C-Cu-O-Sr
• Ba-Ca-Cu-O-Pb-Sr-Y
• Ba-La-Mn-O-Sr
• Ba-Ca-Cu-O-Sr-Tl
• Ba-Cu-O-Pb-Sr-Y
• temperature for congruent melting
• alkaline
• disordered
• chalcogen
• transitional