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We present results of X-ray spectroscopy for TWA 5, a member of the young TWHydrae association, observed with XMM-Newton. TWA~5 is a multiple system whichshows Halpha emission, a signature typical of classical T Tauri stars, but noinfrared excess. From the analysis of the RGS and EPIC spectra, we have derivedthe emission measure distribution vs. temperature of the X-ray emitting plasma,its abundances, and the electron density. The characteristic temperature anddensity of the plasma suggest a corona similar to that of weak-line T Tauristars and active late-type main sequence stars. TWA 5 also shows a low ironabundance (~0.1 times the solar photospheric one) and a pattern of increasingabundances for elements with increasing first ionization potential reminiscentof the inverse FIP effect observed in highly active stars. The especially highratio Ne/Fe~10 is similar to that of the classical T Tauri star TW Hya, wherethe accreting material has been held responsible for the X-ray emission. Wediscuss the possible role of an accretion process in this scenario. Since all TTauri stars in the TW Hydrae association studied so far have very high Ne/Feratios, we also propose that environmental conditions may cause this effect.Comment: 12 pages, 9 postscript figures, accepted for publication in Astronomy  and Astrophysic

XMM-Newton spectroscopy of the metal depleted T Tauri star TWA 5