Alkaline, Non-disordered, Nonmetal, Pressure for structural transition

• O-Sr-W
• F-Mg
• Ba-O-W
• Ca-O-W
• Be-O
• nonmetal
• alkaline
• non-disordered
• chalcogen
• transitional
• orthorhombic
• tetragonal
• cubic
• monoclinic
• hexagonal