  We present a detailed spectral and spatial analysis of the galaxy cluster PKS
0745-191, using recent observations from the Chandra X-ray Observatory. The
data provide information on the temperature and metallicity of the intracluster
medium, the distribution of emission throughout the cluster, morphology of the
cluster core, and an independent mass estimate which can be compared to that
from gravitational lensing. X-ray spectra extracted from the central 300 kpc
(~2 arcmin) are well described by a two-temperature plasma and the mean cluster
temperature is consistent with previously determined values. The distribution
of both temperature and metallicity within the inner 360 kpc (2.3 arcmin) of
PKS 0745-191 is probed on scales of 8 arcsec (~20 kpc), yielding a relatively
constant abundance throughout the region and a strong temperature gradient
(down to ~4-5 keV) within the central 215 kpc. Beta-model fits to the surface
brightness profile of PKS 0745-191 indicate that a second beta-model component
is required to fit the inner ~10 kpc. Imaging analysis of the cluster core
reveals an irregular morphology within the inner 50 kpc, and confirms that the
X-ray emission peak lies within 0.5 arcsec (the spatial resolution of Chandra)
of both the optical and radio central cD positions. The cluster mass, based on
both two temperature and multiphase fits to the X-ray spectrum, is in close
agreement with lensing mass estimates of PKS-0745-191.
