Chalcogen, Disordered, Transitional, Values of sound velocity

• Ba-Cu-O-Y
• Ba-Na-Nb-O
• Cu-La-O-Sr
• K-O-P-Ti
• Cd-Se
• chalcogen
• disordered
• transitional
• oxide
• conductor
• cubic
• orthorhombic
• tetragonal
• trigonal
• monoclinic