Chalcogen, Pyrite-marcasite, Cubic, Phase transitions

• Fe-S
• Co-S-Se
• Ni-S-Se
• Fe-O
• Mg-O
• temperature for congruent melting
• fusion
• structural transitions
• temperature for structural transition
• peritectic formation
• pyrite-marcasite
• chalcogen
• transitional
• disordered