Bekhtin

• Bi-Mn-O-Pb-Sc-Ti
• Bi-Ca-Li-Nb-Nd-O-Sc-W
• Bi-Ni-O-Pb-Sc-Ti
• Bi-Ca-Mo-Nb-Nd-O
• Bi-Mg-Nb-O-Pb-Sc-Ti
• structural properties
• transitional
• chalcogen
• pnictogen
• rare earth
• multinary