Villard

• Bi-Ca-Cu-O-Sr-Y
• Bi-Ca-Cu-O-Sr
• Ba-Cu-Hg-O-V
• Ba-Ca-Cu-Hg-O
• Ba-Bi-Ca-Cu-Hg-O
• structural properties
• alkaline
• transitional
• chalcogen
• pnictogen
• multinary
• tetragonal