Monoclinic, Phase transitions, Si-x polyhedra

• Gd-Ge-Si
• O-Si
• Ge-Si-Tb
• Er-Si
• Al-Ca-H-O-Si
• temperature for congruent melting
• fusion
• structural transitions
• temperature for structural transition
• pressure for structural transition
• metalloid
• chalcogen
• non-disordered
• disordered