Chalcogen, Rare earth, Transitional, Ho-Ta

• Ho-O-Ta
• Ba-Ho-O-Ta
• Eu-Ho-O-Ta
• Ca-Ho-O-Ta
• Ho-N-O-Ta
• thermal and thermodynamic properties
• structural properties
• electronic and electrical properties
• magnetic properties
• phase transitions
• transitional
• rare earth
• chalcogen
• lanthanoid
• oxide
• cubic
• monoclinic
• tetragonal
• orthorhombic
• hexagonal