Mean temperature (EPIC) versus absolute Fe abundance for the full sample. The black squares and the red triangles show the EPIC measurements within 0.05r₅₀₀ and 0.2r₅₀₀, respectively. Each pair of measurements (0.05r₅₀₀,0.2r₅₀₀) that belong to the same hot cluster is connected by a grey dash-dotted line. The blue stars show the RGS measurements (adapted from de Plaa et al. 2016), scaled on their respective EPIC mean temperature within 0.2r₅₀₀. The vertical black dotted line separates the cool groups/ellipticals from the hot clusters (see text).