Temperature vs. Abundance measured for the galaxy clusters in our sample including (top) or excluding the core (bottom). The dotted lines represent the 1σ errors in kT and Z, while shaded areas show the weighted mean in the abundance with its error (blue) and rms dispersion (cyan) in three temperature bins. Althought the values of Z show a larger spread at kT < 5 keV, we do not find any correlation between the two quantities.