Temperature for congruent melting, Trioxoselenate

• H-Mn-O-Se
• Fe-H-O-Se
• Cu-O-Se
• Hg-O-Se
• Co-H-O-Se
• chalcogen
• trioxoselenate
• non-disordered
• transitional
• monoclinic
• orthorhombic
• triclinic
• hexagonal
• trigonal