Chalcogen, Fusion, Pb

• O-Pb-V
• O-Pb
• O-P-Pb-V
• Bi-O-Pb-V
• B-H-O-Pb
• temperature for congruent melting
• chalcogen
• disordered
• transitional
• oxide
• cubic
• orthorhombic
• tetragonal
• monoclinic
• trigonal