Chalcogen, Disordered, Transitional, Longitudinal sound velocity

• Ba-Cu-O-Y
• La-Mn-O-Sr
• Co-Fe-O-Zn
• Ba-Ca-Cu-O-Y
• Ba-Cu-Eu-O
• chalcogen
• disordered
• transitional
• oxide
• conductor
• cubic
• orthorhombic
• tetragonal
• trigonal
• monoclinic