B-Pb, Chalcogen, Phase transitions

• B-H-O-Pb
• B-Bi-O-Pb
• B-O-Pb
• B-Nb-O-Pb
• B-F-O-Pb
• temperature for congruent melting
• fusion
• phase diagram
• decomposition
• chalcogen
• metalloid
• quaternary
• borate
• orthorhombic
• monoclinic
• trigonal
• triclinic
• tetragonal