We present the nonuniform distribution of temperature and abundance in the angular extent of 10 \arcmin ( 1.4 Mpc ) in A 1650 observed by XMM-Newton .
Spectral analysis was carried out in 19 systematically-subdivided regions , and in 15 specified regions referred to the hardness ratio ( HR ) map .
The value of HR , defined as the ratio of counts in the 1.6–10 keV band to those in the 0.8–1.6 keV , is an indicator to investigate the spatial variation of spectral features .
The temperature and abundance were obtained to be 4–6 keV and 0.2–0.5 solar value with average values of 5.62 ^ { +0.05 } _ { -0.07 } 
keV and 0.36 ^ { +0.02 } _ { -0.01 } solar value within a radius of 5 \arcmin , respectively .
The redshift was derived to be 8.01 ^ { +0.02 } _ { -0.02 } \times 10 ^ { -2 } against an optical value of 8.45 \times 10 ^ { -2 } .
It turned out that cool regions with a temperature of around 4 keV and a scalelength of a few 100 kpc are patchily distributed in the outer envelope .
This temperature structure could be explained by the infalling of groups of galaxies into the cluster main body .
More than 30 point sources were found around A 1650 in the FOV of 30 \arcmin .
The spectrum of the Galactic diffuse emission was obtained in the outskirts of A 1650 .