Pressure and doping dependent anisotropic compressibility of the SmFeAsO1−xFx (x = 0.0-0.17) system

► High-pressure synchrotron diffraction experiments of SmFeAsO1−xFx system. ► The response of the lattice to the applied pressure is anisotropic. ► The compressibility of SmFeAsO1−xFx (x = 0.17) is non-isotropic and pressure dependent.