B-Fe-O-Tb, Metalloid, Trigonal

• B-Fe-O-Sr-Tb
• B-Ba-Fe-O-Tb
• B-Er-Fe-O-Tb
• magnetic properties
• thermal and thermodynamic properties
• magnetization
• electronic and electrical properties
• phase transitions
• rare earth
• metalloid
• chalcogen
• lanthanoid
• transitional