O-Si, Phase transitions

• Ca-O-Si
• Fe-O-Si
• Al-H-Na-O-Si
• Al-Ca-H-O-Si
• fusion
• temperature for congruent melting
• phase diagram
• structural transitions
• metalloid
• chalcogen
• silicate
• disordered
• monoclinic
• orthorhombic
• hexagonal
• trigonal
• tetragonal