Van bael

• Bi-Cr-Fe-Mn-O
• Nb-O
• Nb-O-Ta
• Ba-Cu-O-Y
• O-Ta
• structural properties
• magnetic properties
• magnetic susceptibility
• values of magnetic susceptibility
• Curie-Weiss paramagnetism
• chalcogen
• transitional
• quinary
• pnictogen
• disordered
• orthorhombic
• monoclinic
• tetragonal