Zoom-in of the metallicity map shown in Fig. 7. White contours show the central radio galaxy at 144 MHz (levels are the same of Fig. 1). The translucent black area within the black dashed circles shows the predicted location of the iron radius (see text for details), which matches the position of the metal-rich arcs. The black central region corresponds to the BCG, whose X-ray emission was excluded in creating ICM spectral maps (see Sects. 4.2 and 4.6).