Chalcogen, Disordered, Rare earth, Orthorhombic, Sound velocity

• Ba-Cu-O-Y
• Ca-La-Mn-O
• Ba-Ca-Cu-O-Y
• Cu-La-O-Sr
• Ba-Cu-Eu-O
• longitudinal sound velocity
• transverse sound velocity
• values of sound velocity
• disordered
• chalcogen
• rare earth
• transitional
• oxide