Chalcogen, Conductor, Metal, Superconductor, Residual resistivity ratio

• Nb-Se
• Fe-Se
• Se-Ta
• Cd-O-Re
• Nb-S
• metal
• superconductor
• conductor
• chalcogen
• transitional
• hexagonal
• tetragonal
• trigonal
• orthorhombic
• monoclinic