Monoclinic, Se-Ta, Se-x polyhedra

• Ni-Se-Ta
• As-K-Se-Ta
• Fe-Nb-Se-Ta
• Nb-Ni-Se-Ta
• thermal and thermodynamic properties
• electronic and electrical properties
• conductivity or resistivity
• structural properties
• mechanical properties
• transitional
• chalcogen
• selenide
• non-disordered