Chalcogen, Lanthanoid, Rare earth, Hexagonal, Paramagnetic moment

• Ho-Mn-O
• Ba-Ho-Ir-O-Ru
• Ba-Dy-Ir-O-Ru
• Ba-Er-Ir-O-Ru
• Ba-Gd-Ir-O-Ru
• rare earth
• chalcogen
• lanthanoid
• transitional
• oxide