Chalcogen, O-Si, Phase transitions, Tetrahedron 4-vertex

• Al-H-Na-O-Si
• Al-Ca-H-O-Si
• Ca-O-Si
• Al-Na-O-Si
• fusion
• temperature for congruent melting
• structural transitions
• temperature for structural transition
• pressure for structural transition
• metalloid
• chalcogen
• disordered
• silicate
• monoclinic
• orthorhombic
• hexagonal
• triclinic
• cubic