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

• O-Sr-W
• Ba-O-W
• Ba-O
• Ba-Cu-O-Y
• Ca-O-W
• chalcogen
• non-disordered
• alkaline
• transitional
• nonmetal
• cubic
• orthorhombic
• tetragonal
• monoclinic
• hexagonal