Mg-x polyhedra, Nonmetal, Structural transitions

• Mg-Nb-O-Pb-Ti
• Mg-Nb-O-Pb
• Mg-O-Pb-W
• F-Mg
• Cr-Mg-O
• temperature for structural transition
• pressure for structural transition
• structural transition
• alkaline
• nonmetal
• chalcogen
• transitional
• disordered
• cubic
• tetragonal
• monoclinic
• orthorhombic
• trigonal