Chalcogen, Phase transitions

• Ba-O-Ti
• C-H-N-O
• Fe-O
• Fe-Te
• O-V
• fusion
• temperature for congruent melting
• structural transitions
• phase diagram
• chalcogen
• transitional
• cell and atoms
• oxide
• disordered
• orthorhombic
• monoclinic
• cubic
• tetragonal
• trigonal