كسارة الكوبالت مصر. perovskite خام PCL سعر محطم. Perovskite (structure) . Structure of a perovskite with general chemical formula ABX red spheres are X atoms (usually oxygens), the blue spheres are B atoms (a smaller metal ion, such as Ti 4+), and the green spheres are the A atoms (a larger metal ion, such as Ca 2+).Pictured is the undistorted get price