A detailed analysis of XMM-Newton observations of ClJ0046.3 + 8530 ( z = 0.624 ) is presented . The cluster has a moderate temperature ( kT = 4.1 \pm 0.3 \mbox { $ \mathrm { ~ { } keV } $ } ) and appears to be relaxed . Emission is detected at \geq 3 \sigma significance to a radius of 88 \% of R _ { \mathrm { 200 } } ( the radius enclosing an overdensity of 200 times the critical density at z = 0.624 ) in a surface-brightness profile . A temperature profile ( extending to 0.7 R _ { \mathrm { 200 } } ) , and hardness-ratio map show no significant departures from the global temperature , within the statistical limits of the data . The cluster ’ s bolometric X-ray luminosity is L _ { X } = ( 4.3 \pm 0.3 ) \times 10 ^ { 44 } \mathrm { \mbox { $ \mathrm { ~ { } erg } $ } \mathrm { \mbox { % $ \mathrm { ~ { } s } $ } ^ { -1 } } } , and the total mass derived within R _ { \mathrm { 200 } } , assuming isothermality and hydrostatic equilibrium , is M _ { 200 } = 3.0 ^ { +0.6 } _ { -0.5 } \times 10 ^ { 14 } \mathrm { M _ { \odot } } . The gas entropy measured at 0.1 R _ { \mathrm { 200 } } is compared with a sample of local systems , and found to be consistent with self-similar evolution with redshift . The metallicity , gas density profile slope , and gas mass fraction are all consistent with those found in low-z clusters .