K0.67NbSe2 hP8 187

• Na-S-Ta
• Eu-Nb-S
• K-Nb-S
• K-S-Ta
• Na-Se-Ta
• structural properties
• electronic and electrical properties
• superconductivity
• conductivity or resistivity
• critical magnetic field
• transitional
• disordered
• chalcogen
• ternary
• alkali
• hexagonal