Hello Asfaw Zinabu

JCPDS card is very difficult to obtain, once this is a paid database. There are free databases that provide Crystallographic Information Files (CIFs) of crystal structures, and you can access by your own.

The difference of CIF and JCPDS cards is:

The JCPDS cards provides you some information about the structure, like unit cells dimensions, space group and a list of miller indices with intensity of each reflection.

The CIF file provides information about the unit cells dimension, space group and there is a list of cell's atoms. The CIF doesn't provide the miller indices reflection list that cards provide. HOWEVER, with the CIF file, you can use a software to generate the list of miller indicies reflection.

Softwares like VESTA or Mercury can do this, search for some tutorials in internet. If you need help, let me know.

Best regards,

Ricardo Tadeu.