Metalloid, O-Si, Phase transitions, Trigonal

• F-Fe-H-O-Si
• F-H-Mn-O-Si
• F-H-Mg-O-Si
• Ba-Fe-Nb-O-Si
• temperature for congruent melting
• fusion
• structural transitions
• temperature for structural transition
• pressure for structural transition
• chalcogen
• metalloid
• disordered
• silicate