Chalcogen, Oxide, Ho-O, Phase transitions

• Ho-Mn-O
• Ba-Cu-Ho-O
• Fe-Ho-O
• Ca-Ho-Mn-O
• temperature for congruent melting
• fusion
• structural transitions
• temperature for structural transition
• rare earth
• oxide
• lanthanoid
• chalcogen
• transitional
• orthorhombic
• cubic
• monoclinic
• tetragonal
• trigonal