Chalcogen, Rare earth, Ho-O, Temperature for congruent melting

• Ho-Mo-O
• Ba-Cu-Ho-O
• Ho-Mn-O
• H-Ho-N-O
• B-Ho-O
• lanthanoid
• rare earth
• chalcogen
• oxide
• monoclinic
• orthorhombic
• cubic
• tetragonal
• trigonal