I've been looking for a .cif file for the superconducting phases of BSCCO(2201), BSCCO(2212), and BSCCO(2223). I know they are tetragonal crystals, but every file I find seems to fit it to an orthorhombic unit cell. Does anyone either know where I can get the tetragonal .cif files? Also, does anyone know why everyone seems to use an orthorhombic representation for BSCCO? I haven't been able to find an answer for that.