Dichlorotin phthalocyanine crystal, process for producing the same, and electrophotographic photoreceptor using the same

An electrophotographic photoreceptor comprising a conductive substrate having thereon a photosensitive layer containing a dichlorotin phthalocyanine crystal showing, in the X-ray diffractometry using a CuK.sub..alpha. ray, peaks at Bragg angles (2.theta..+-.0.2.degree.) of 8.3.degree., 12.2.degree., 13.7.degree., and 28.2.degree. with any other peak(s) observed at a Bragg angle(s) between 25.degree. and 30.degree. having an intensity of not more than 30% of that of the peak at 28.2.degree..

The electrophotographic photoreceptor comprising a conductive substrate having thereon a photosensitive layer containing a dichlorotin phthalocyanine crystal which shows a diffraction pattern against a CuK.sub..alpha. ray with distinct peaks at 8.3.degree., 12.2.degree., 13.7.degree., and 28.2.degree. in which the highest of the peaks appearing within a Bragg angle (2.theta.+0.2.degree.) range between 25.degree. and 30.degree. is at 28.2.degree..