Hello,

Access JCPDS is extremely difficult because it's a paid database. Alternatively, you can search for the crystal structure of Fe2O3 in Crystallographic databases, like COD and CCDC. But why do you need to Access JCPDS cards?

Sincerely,

Ricardo Tadeu

In the RRUFF free database you can find physical chemical information about your mineral, such as XRD, Raman....

You can also use the free database American Mineralogist Crystal Structure Database, that is part of RRUFF, in which you can find the CIF files.

Or search in the literature to find a list of the main peaks of hematite, it is a very common mineral